docs: update migration guide headings (#2638)

Remove dates from in front of version numbers on migration guides, as
we're adjusting to this format going forward. Includes removal of the
placeholder "x/x/2024" dates that were added. The button component
was excluded from this update as they're already removed in the button
s2 migration PR.

Author: jawinn

components/actionbutton/metadata/actionbutton.yml

@@ -12,7 +12,7 @@ sections:
       This component can be modified via its `--mod-*` prefixed custom properties. A list of those prefixed custom properties can be found <a class="spectrum-Link" href="https://github.com/adobe/spectrum-css/tree/main/components/actionbutton/metadata/mods.md">here</a>.
   - name: Migration Guide
     description: |
-      ### x/x/2024 - Version 6.0.0
+      ### Version 6.0.0
       #### Spectrum 2 release
       Action button now uses Spectrum 2 tokens and specifications. A few notable changes:
       - The mod custom property `--mod-line-height-100` has been renamed to `--mod-button-line-height`.

components/buttongroup/metadata/buttongroup.yml

@@ -3,7 +3,7 @@ SpectrumSiteSlug: https://spectrum.adobe.com/page/button/
 sections:
   - name: Migration Guide
     description: |
-      ### 1/24/2024 - Version 7.0.0
+      ### Version 7.0.0
       #### Spectrum 2 migration also removed `.spectrum-ButtonGroup--sizeM`, `.spectrum-ButtonGroup--sizeL`, and `.spectrum-ButtonGroup--sizeXL`
         Since each of these classes were using the same tokens for spacing, these classes were removed.
   - name: Custom Properties API

components/fieldlabel/metadata/fieldlabel.yml

@@ -6,14 +6,14 @@ sections:
       This component can be modified via its `--mod-*` prefixed custom properties. A list of those prefixed custom properties can be found <a class="spectrum-Link" href="https://github.com/adobe/spectrum-css/tree/main/components/fieldlabel/metadata/mods.md">here</a>.
   - name: Migration Guide
     description: |
-      ### x/x/2024 - Version 8.0.0
+      ### Version 8.0.0
       #### Spectrum 2 release
       Field label now uses Spectrum 2 tokens and specifications. A few notable changes and additions:
       - The medium size styles are used by default, so the `spectrum-FieldLabel--sizeM` class is no longer necessary and has been removed.
       - Two variant classes have been added for black and white static colors.
       - The mod custom property `--mod-disabled-content-color` has been renamed to `--mod-field-label-disabled-content-color`.
 
-      ### 11/13/2020 - Version 3.0.0
+      ### Version 3.0.0
       #### T-shirt sizing
       Field label now supports t-shirt sizing and requires that you specify the size by adding a `.spectrum-FieldLabel--size*` class.
 examples:

components/fieldlabel/metadata/form.yml

@@ -6,7 +6,7 @@ sections:
       This component can be modified via its `--mod-*` prefixed custom properties. A list of those prefixed custom properties can be found <a class="spectrum-Link" href="https://github.com/adobe/spectrum-css/tree/main/components/fieldlabel/metadata/mods.md">here</a>.
   - name: Migration Guide
     description: |
-      ### x/x/2024 - Version 8.0.0
+      ### Version 8.0.0
       #### Spectrum 2 release
       The renamed mod properties previously marked as deprecated have been removed:
       - `--mod-tableform-item-block-spacing` has been renamed to `--mod-form-item-block-spacing`

components/logicbutton/metadata/logicbutton.yml

@@ -4,15 +4,15 @@ description: A LogicButton displays an operator within a boolean logic sequence.
 sections:
   - name: Migration Guide
     description: |
-      ### x/x/2024 - Version 4.0.0
+      ### Version 4.0.0
       #### Spectrum 2 release
       Logic button now uses Spectrum 2 tokens and specifications. A few notable changes:
       - The mod custom property `--mod-line-height-100` has been renamed to `--mod-button-line-height`.
       - The mod custom property `--mod-sans-font-family-stack` has been renamed to `--mod-button-font-family`.
       - The mod custom property `--mod-focus-indicator-gap` has been renamed to `--mod-button-focus-indicator-gap`.
       - The mod custom property `--mod-animation-duration-100` has been renamed to `--mod-button-animation-duration`.
 
-      ### 8/16/2023 - Version 2.0.0
+      ### Version 2.0.0
       #### Remove focus-ring class
       We've migrated away from the focus-ring class in favor of the native `:focus-visible` pseudo-class due to changes in browser support.
 examples:

components/picker/metadata/picker.yml

@@ -7,7 +7,7 @@ sections:
       This component can be modified via its `--mod-*` prefixed custom properties. A list of those prefixed custom properties can be found <a class="spectrum-Link" href="https://github.com/adobe/spectrum-css/tree/main/components/picker/metadata/mods.md">here</a>.
   - name: Migration Guide
     description: |
-      ### x/x/2024 - Version 8.0.0
+      ### Version 8.0.0
       #### Spectrum 2 release
       Picker now uses Spectrum 2 tokens and specifications. A few notable changes:
       - The mod custom property `--mod-line-height-100` has been renamed to `--mod-button-line-height`.