add another fallback to main

Author: erik-krogh

.github/workflows/compile-queries.yml

@@ -31,6 +31,7 @@ jobs:
           restore-keys: |
             codeql-compile-${{ github.base_ref }}-${{ env.merge-base }}
             codeql-compile-${{ github.base_ref }}-
+            codeql-compile-main-
       - name: Fill CodeQL query compilation cache - main
         if: ${{ github.event_name != 'pull_request' }}
         uses: actions/cache@v3