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/supply-chain-pr.yml

@@ -177,9 +177,11 @@ jobs:
             exit 0
           fi
 
-          echo "artifact_found=true" >> "$GITHUB_OUTPUT"
-          echo "artifact_id=${ARTIFACT_ID}" >> "$GITHUB_OUTPUT"
-          echo "artifact_name=${ARTIFACT_NAME}" >> "$GITHUB_OUTPUT"
+          {
+            echo "artifact_found=true"
+            echo "artifact_id=${ARTIFACT_ID}"
+            echo "artifact_name=${ARTIFACT_NAME}"
+          } >> "$GITHUB_OUTPUT"
           echo "✅ Found artifact: ${ARTIFACT_NAME} (ID: ${ARTIFACT_ID})"
 
       - name: Skip if no artifact
@@ -317,11 +319,13 @@ jobs:
           LOW_COUNT=$(jq '[.matches[] | select(.vulnerability.severity == "Low")] | length' grype-results.json 2>/dev/null || echo "0")
           TOTAL_COUNT=$(jq '.matches | length' grype-results.json 2>/dev/null || echo "0")
 
-          echo "critical_count=${CRITICAL_COUNT}" >> "$GITHUB_OUTPUT"
-          echo "high_count=${HIGH_COUNT}" >> "$GITHUB_OUTPUT"
-          echo "medium_count=${MEDIUM_COUNT}" >> "$GITHUB_OUTPUT"
-          echo "low_count=${LOW_COUNT}" >> "$GITHUB_OUTPUT"
-          echo "total_count=${TOTAL_COUNT}" >> "$GITHUB_OUTPUT"
+          {
+            echo "critical_count=${CRITICAL_COUNT}"
+            echo "high_count=${HIGH_COUNT}"
+            echo "medium_count=${MEDIUM_COUNT}"
+            echo "low_count=${LOW_COUNT}"
+            echo "total_count=${TOTAL_COUNT}"
+          } >> "$GITHUB_OUTPUT"
 
           echo "📊 Vulnerability Summary:"
           echo "  Critical: ${CRITICAL_COUNT}"