Show the Snyk failure

This change will show the Snyk failure in the Github Actions workflow
otherwise it is obscured and shows that everything passed (which is
incorrect)

Author: timler

.github/workflows/build.yml

@@ -103,6 +103,7 @@ jobs:
       run: npm install -g snyk
 
     - name: Run Snyk to check for vulnerabilities
+      id: snyk
       continue-on-error: true
       env:
         SNYK_TOKEN: ${{ secrets.SNYK_TOKEN }}
@@ -111,4 +112,10 @@ jobs:
     - name: Upload result to GitHub Code Scanning
       uses: github/codeql-action/upload-sarif@v3
       with:
-        sarif_file: snyk.sarif
+        sarif_file: snyk.sarif
+
+    - name: Check Snyk scan status
+      if: steps.snyk.outcome == 'failure'
+      run: |
+        echo "Security vulnerabilities found"
+        exit 1