fix: use double quotes for environment variable assignments in workflows

- Updated environment variable assignments in multiple workflow files to use double quotes for consistency and to prevent potential issues with variable expansion.
- Refactored echo commands to group multiple lines into a single block for improved readability in the following workflows:
  - release-goreleaser.yml
  - renovate_prune.yml
  - security-pr.yml
  - security-weekly-rebuild.yml
  - supply-chain-pr.yml
  - supply-chain-verify.yml
  - update-geolite2.yml
  - waf-integration.yml
  - weekly-nightly-promotion.yml

.github/workflows/gh_cache_cleanup.yml

@@ -13,15 +13,14 @@ jobs:
       - name: Cleanup
         run: |
           echo "Fetching list of cache keys"
-          cacheKeysForPR=$(gh cache list --ref $BRANCH --limit 100 --json id --jq '.[].id')
+          cacheKeysForPR=$(gh cache list --ref "$BRANCH" --limit 100 --json id --jq '.[].id')
 
           ## Setting this to not fail the workflow while deleting cache keys.
           set +e
           echo "Deleting caches..."
-          for cacheKey in $cacheKeysForPR
-          do
-              gh cache delete $cacheKey
-          done
+            while IFS= read -r cacheKey; do
+              gh cache delete "$cacheKey"
+            done <<< "$cacheKeysForPR"
           echo "Done"
         env:
           GH_TOKEN: ${{ github.token }}