Add content: write rights for backporting job (#7826)

* Do not run primers tests on backporting branches

* Add content: write rights for backporting job

We need it to push to the backporting branch after cherry-picking

See #7810

* [github actions] Add a version comment so the tag is clearer

Co-authored-by: Marc Mueller <30130371+cdce8p@users.noreply.github.com>

.github/workflows/backport.yml

@@ -7,6 +7,7 @@ on:
 
 permissions:
   pull-requests: write
+  contents: write
 
 jobs:
   backport:
@@ -23,6 +24,6 @@ jobs:
         )
       )
     steps:
-      - uses: tibdex/backport@2e217641d82d02ba0603f46b1aeedefb258890ac
+      - uses: tibdex/backport@2e217641d82d02ba0603f46b1aeedefb258890ac # v2.0.3
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}