Add permissions that were missed on the first pass

.github/workflows/backport.yml

@@ -12,6 +12,8 @@ permissions:
 jobs:
   backport:
     runs-on: ubuntu-latest
+    permissions:
+      contents: write  # required for pushing changes
     steps:
       - run: |
           if [[ ! $GITHUB_REF_NAME =~ ^release/v[0-9]+\.[0-9]+\.x-0\.[0-9]+bx$ ]]; then

.github/workflows/prepare-patch-release.yml

@@ -10,6 +10,8 @@ jobs:
     permissions:
       pull-requests: write # required for adding labels to PRs
     runs-on: ubuntu-latest
+    permissions:
+      contents: write  # required for pushing changes
     steps:
       - uses: actions/checkout@v4
 

.github/workflows/prepare-release-branch.yml

@@ -46,6 +46,8 @@ jobs:
       pull-requests: write # required for adding labels to PRs
     runs-on: ubuntu-latest
     needs: prereqs
+    permissions:
+      contents: write  # required for pushing changes
     steps:
       - uses: actions/checkout@v4
 
@@ -130,6 +132,8 @@ jobs:
       pull-requests: write # required for adding labels to PRs
     runs-on: ubuntu-latest
     needs: prereqs
+    permissions:
+      contents: write  # required for pushing changes
     steps:
       - uses: actions/checkout@v4