Update GitHub workflow to use GH_PAT and IMAGE_TAG instead of GIT_PAT

Author: sugesh-cloudops

.github/workflows/kustomize-ci.yaml

@@ -69,7 +69,8 @@ jobs:
 
         - name: Commit and push changes
           env:
-            GITHUB_TOKEN: ${{ secrets.GIT_PAT }}
+            TOKEN: ${{ secrets.GH_PAT }}
+            IMAGE_TAG: ${{ env.IMAGE_TAG }}
           run: |
             git config --global user.name ${{ secrets.GIT_USER_EMAIL }}
             git config --global user.email ${{ secrets.GIT_USER_NAME }}