Install ripgrep in CI workflow

.github/workflows/ci.yml

@@ -43,6 +43,9 @@ jobs:
         if: steps.node-modules-cache.outputs.cache-hit != 'true'
         run: npm ci
 
+      - name: Install ripgrep
+        run: sudo apt-get update && sudo apt-get install -y ripgrep
+
       - name: Run lint suite
         run: npm run lint