set autorest.powershell v4 as default version loaded by autorest (#4793)

* set autorest.powershell v4 as default version loaded by autorest

* Add change description for @autorest/configuration

---------

Co-authored-by: Timothee Guerin <tiguerin@microsoft.com>

common/changes/@autorest/configuration/setv4forpowershell_2023-11-15-04-44.json

@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@autorest/configuration",
+      "comment": "Set autorest.powershell v4 the default version loaded by autorest",
+      "type": "minor"
+    }
+  ],
+  "packageName": "@autorest/configuration"
+}

packages/libs/configuration/resources/plugin-powershell.md

@@ -12,7 +12,7 @@ try-require: ./readme.powershell.md
 Note: if the --powershell is mentioned, but they are using autorest.powershell locally, don't try to load the autorest.powershell from npm.
 
 ```yaml $(powershell) && !isLoaded('@autorest/powershell')
-# load the extension  (3.0+)
+# load the extension  (4.0+)
 use-extension:
-  "@autorest/powershell": "~3.0.0"
+  "@autorest/powershell": "~4.0.0"
 ```

packages/libs/configuration/src/configuration-loader/configuration-loader.ts

@@ -268,7 +268,7 @@ export class ConfigurationLoader {
     // Add a hint here to make legacy users to be aware that the default version has been bumped to 3.0+.
     if (shortname === "powershell") {
       this.logger.info(
-        `\n## The default version of @autorest/powershell has been bumped from 2.1+ to 3.0+.\n > If you still want to use 2.1+ version, please specify it with --use:@autorest/powershell@2.1.{x}, e.g 2.1.401.\n`,
+        `\n## The default version of @autorest/powershell has been bumped from 3.0+ to 4.0+.\n > If you still want to use 3.0+ version, please specify it with --use:@autorest/powershell@3.0.{x}, e.g 3.0.512.\n`,
       );
     }