fix(meter): address indentation error

Author: jenndiaz

components/progressbar/metadata/meter.yml

@@ -12,7 +12,7 @@ sections:
   - name: Custom Properties API
     description: |
       This component can be modified via its `--mod-*` prefixed custom properties. A list of those prefixed custom properties can be found <a href="https://github.com/adobe/spectrum-css/tree/main/components/progressbar/metadata/mods.md">here</a>.
- - name: Migration Guide
+  - name: Migration Guide
     description: |
       ### spectrum-Meter class
       Meter now uses the class `spectrum-Meter` on the parent `div`