Add "JSON" to the "Open settings file" command names (#13265)

![image](https://user-images.githubusercontent.com/18356694/173090336-3512ee36-ae8b-41d5-8823-09cb1354c7ef.png)

* [x] Closes #13225

(cherry picked from commit dc8183a)
Service-Card-Id: 83524146
Service-Version: 1.14

src/cascadia/TerminalSettingsModel/Resources/en-US/Resources.resw

@@ -299,16 +299,19 @@
     <value>Next tab</value>
   </data>
   <data name="OpenBothSettingsFilesCommandKey" xml:space="preserve">
-    <value>Open both settings and default settings files</value>
+    <value>Open both settings and default settings files (JSON)</value>
+    <comment>{Locked="JSON"}. "JSON" is the extension of the file that will be opened.</comment>
   </data>
   <data name="OpenDefaultSettingsCommandKey" xml:space="preserve">
-    <value>Open default settings file</value>
+    <value>Open default settings file (JSON)</value>
+    <comment>{Locked="JSON"}. "JSON" is the extension of the file that will be opened.</comment>
   </data>
   <data name="OpenNewTabDropdownCommandKey" xml:space="preserve">
     <value>Open new tab dropdown</value>
   </data>
   <data name="OpenSettingsCommandKey" xml:space="preserve">
-    <value>Open settings file</value>
+    <value>Open settings file (JSON)</value>
+    <comment>{Locked="JSON"}. "JSON" is the extension of the file that will be opened.</comment>
   </data>
   <data name="OpenTabColorPickerCommandKey" xml:space="preserve">
     <value>Set the tab color...</value>