[Dock] Add pin instructions (#46052)

## Summary of the Pull Request

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- [ ] Closes: #xxx
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- [ ] **Communication:** I've discussed this with core contributors
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- [ ] **Tests:** Added/updated and all pass
- [ ] **Localization:** All end-user-facing strings can be localized
- [ ] **Dev docs:** Added/updated
- [ ] **New binaries:** Added on the required places
- [ ] [JSON for
signing](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
for new binaries
- [ ] [WXS for
installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs)
for new binaries and localization folder
- [ ] [YML for CI
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
for new test projects
- [ ] [YML for signed
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/release.yml)
- [ ] **Documentation updated:** If checked, please file a pull request
on [our docs
repo](https://github.com/MicrosoftDocs/windows-uwp/tree/docs/hub/powertoys)
and link it here: #xxx

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## Detailed Description of the Pull Request / Additional comments

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src/modules/cmdpal/Microsoft.CmdPal.UI/Strings/en-us/Resources.resw

@@ -950,9 +950,15 @@ Right-click to remove the key combination, thereby deactivating the shortcut.</v
     <value>Unpin</value>
   </data>
   <data name="Dock_AddBand_NoCommandsAvailable.Text" xml:space="preserve">
-    <value>No commands available to pin</value>
+    <value>All available bands are already pinned.</value>
   </data>
-  <data name="Dock_AddBand_StartTooltip.[using:Microsoft.UI.Xaml.Controls]ToolTipService.ToolTip" xml:space="preserve">
+	<data name="Dock_Pin_Instruction.Text" xml:space="preserve">
+    <value>To pin commands, extensions or apps, use the Pin to Dock command in Command Palette.</value>
+  </data>
+	<data name="Dock_Bands_Header.Text" xml:space="preserve">
+    <value>Bands</value>
+  </data>	
+	<data name="Dock_AddBand_StartTooltip.[using:Microsoft.UI.Xaml.Controls]ToolTipService.ToolTip" xml:space="preserve">
     <value>Add band to start</value>
   </data>
   <data name="Dock_AddBand_CenterTooltip.[using:Microsoft.UI.Xaml.Controls]ToolTipService.ToolTip" xml:space="preserve">