Change fix of previous commit: merge perms rather than deleting new ones.

Author: MichaelRFairhurst

.github/workflows/update-check-run.yml

@@ -1,4 +1,7 @@
 name: Update check run
+permissions:
+  contents: read
+  checks: write
 
 on:
   workflow_dispatch:
@@ -37,9 +40,6 @@ on:
         type: string
         default: '{}'
 
-permissions:
-  checks: write
-
 jobs:
   update-check-run:
     runs-on: ubuntu-22.04