[Hub Generated] Review request for Microsoft.Confluent to add version…

… stable/2021-12-01 (Azure#17070)

* Adds base for updating Microsoft.Confluent from version preview/2021-09-01-preview to version 2021-12-01

* Updates readme

* Updates API version in new specs and examples

* Fixing spellcheck and updating readme files (Azure#17071)

* Update confluent.json (Azure#18254)

Fixing linting errors

* Update confluent.json for LintDiff fixes (Azure#18261)

cSpell.json

@@ -816,7 +816,7 @@
             ]
         },
         {
-            "filename": "**/specification/confluent/resource-manager/Microsoft.Confluent/preview/*/confluent.json",
+            "filename": "**/specification/confluent/resource-manager/Microsoft.Confluent/*/*/confluent.json",
             "words": [
                 "orgvalidate"
             ]