Adjust command names for backward compatibility with GA version (#10670)

Co-authored-by: Sonia Taneja <[email protected]>

Author: sotaneja

specification/maintenance/resource-manager/readme.az.md

@@ -9,4 +9,23 @@ az:
   package-name: azure-mgmt-maintenance
 az-output-folder: $(azure-cli-extension-folder)/src/maintenance
 python-sdk-output-folder: "$(az-output-folder)/azext_maintenance/vendored_sdks/maintenance"
+
+directive:
+  - where:
+      group: maintenance apply-update
+    set:
+      group: maintenance applyupdate
+  - where:
+      group: maintenance maintenance-configuration
+    set:
+      group: maintenance configuration
+  - where:
+      group: maintenance configuration-assignment
+    set:
+      group: maintenance assignment
+  - where:
+      group: maintenance public-maintenance-configuration
+    set:
+      group: maintenance public-configuration
+
 ```