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/renovate_prune.yml

@@ -26,10 +26,10 @@ jobs:
         run: |
           if [ -n "${{ secrets.GITHUB_TOKEN }}" ]; then
             echo "Using GITHUB_TOKEN" >&2
-            echo "GITHUB_TOKEN=${{ secrets.GITHUB_TOKEN }}" >> $GITHUB_ENV
+            echo "GITHUB_TOKEN=${{ secrets.GITHUB_TOKEN }}" >> "$GITHUB_ENV"
           else
             echo "Using CHARON_TOKEN fallback" >&2
-            echo "GITHUB_TOKEN=${{ secrets.CHARON_TOKEN }}" >> $GITHUB_ENV
+            echo "GITHUB_TOKEN=${{ secrets.CHARON_TOKEN }}" >> "$GITHUB_ENV"
           fi
       - name: Prune renovate branches
         uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8