Use same format for next and current release versions (#34262)

.github/workflows/cut_release_branch.yml

@@ -35,7 +35,7 @@ on:
       NEXT_VERSION:
         description: Next release version
         required: true
-        default: '2.XX.0'
+        default: '2.XX'
       CREATE_RELEASE_BRANCH:
         description: Whether to cut the release branch. You shouldnt skip this unless it has already been completed successfully (yes/no)
         required: true
@@ -97,10 +97,10 @@ jobs:
     steps:
       - name: Validate Next Version
         run: |
-          if [[ $NEXT_RELEASE =~ ([0-9]+\.[0-9]+\.[0-9]+) ]]; then
-            echo "NEXT_VERSION_IN_BASE_BRANCH=${BASH_REMATCH[1]}" >> $GITHUB_ENV
+          if [[ $NEXT_RELEASE =~ ([0-9]+\.[0-9]+) ]]; then
+            echo "NEXT_VERSION_IN_BASE_BRANCH=${BASH_REMATCH[1]}.0" >> $GITHUB_ENV
           else
-            echo "The input for NEXT_RELEASE does not match a valid format [0-9]+\.[0-9]+\.[0-9]+"
+            echo "The input for NEXT_RELEASE does not match a valid format [0-9]+\.[0-9]+"
             exit 1
           fi
       - name: Check out code