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/codecov-upload.yml

@@ -51,7 +51,7 @@ jobs:
           CGO_ENABLED: 1
         run: |
           bash scripts/go-test-coverage.sh 2>&1 | tee backend/test-output.txt
-          exit ${PIPESTATUS[0]}
+          exit "${PIPESTATUS[0]}"
 
       - name: Upload backend coverage to Codecov
         uses: codecov/codecov-action@671740ac38dd9b0130fbe1cec585b89eea48d3de # v5
@@ -88,7 +88,7 @@ jobs:
         working-directory: ${{ github.workspace }}
         run: |
           bash scripts/frontend-test-coverage.sh 2>&1 | tee frontend/test-output.txt
-          exit ${PIPESTATUS[0]}
+          exit "${PIPESTATUS[0]}"
 
       - name: Upload frontend coverage to Codecov
         uses: codecov/codecov-action@671740ac38dd9b0130fbe1cec585b89eea48d3de # v5