[hack] Document upstream push permissions in create-release-tag.py

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: mtnbikenc

hack/create-release-tag.py

@@ -15,6 +15,11 @@
 
     --commit is required when the version has no entry in the bundle catalog
     (e.g. backport releases that were never shipped as a container image).
+
+Note:
+    Pushing tags to the upstream openshift/windows-machine-config-operator
+    repository requires write access granted by the repository administrators.
+    Contact the WMCO team to have your GitHub account added before pushing.
 """
 
 import argparse
@@ -155,6 +160,11 @@ def main():
 Examples:
   python3 hack/create-release-tag.py 10.21.1
   python3 hack/create-release-tag.py 10.17.2 --commit abc1234 --date 2025-06-03
+
+Note:
+  Pushing tags to the upstream openshift/windows-machine-config-operator
+  repository requires write access granted by the repository administrators.
+  Contact the WMCO team to have your GitHub account added before pushing.
 """,
     )
     parser.add_argument("version", metavar="X.Y.Z",