Add write permissions to release process (#1766)

* Add write permissions to release process

This looks to be required now due to recent repo settings changes

* Also add pull-requests permission

.github/workflows/release-process.yml

@@ -16,6 +16,10 @@ on:
         required: false
         default: 'bump'
 
+permissions:
+  contents: write
+  pull-requests: write
+
 jobs:
   release_process:
     name: Run the release process