docs(installation/roadmap): update page content

Author: johnleider

packages/docs/src/pages/en/getting-started/installation.md

@@ -11,7 +11,7 @@ related:
 
 <alert type="error">
 
-  You are currently on the **Vuetify 2** documentation. For Vuetify 3, please navigate [here](https://next.vuetifyjs.com/)
+  You are viewing documentation for **Vuetify 2**. For instructions on installing **Vuetify 3**, navigate to the [Version 3 Installation Guide](https://next.vuetifyjs.com/introduction/guide/)
 
 </alert>
 

packages/docs/src/pages/en/introduction/roadmap.md

@@ -34,6 +34,8 @@ The following releases are currently under development:
 - **Overview:** Labs is a new package that includes large components from Vuetify 2 in a pre-production state. Tentative list of components to be released:
   - `v-data-table`
   - `v-date-picker`
+- **Up Next:**
+  - `v-calendar`
 
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