Add permissions to the github workflow that creates a PR for merging main into develop (#5362)

Author: hmottestad

.github/workflows/merge_main_to_develop.yml

@@ -5,8 +5,15 @@ on:
     branches:
     - "main"
 
+concurrency:
+  group: ${{ github.ref }}-sync
+  cancel-in-progress: true
+
 jobs:
   pull-request:
+    permissions:
+      contents: read
+      pull-requests: write
     runs-on: ubuntu-latest
     steps:
     - name: Checkout