updated snyk workflow

Author: mayank0202

.github/workflows/snyk.yaml

@@ -29,6 +29,6 @@ jobs:
       - name: install Snyk CLI
         run: npm install -g snyk
       - name: snyk monitor
-        run: snyk iac test --report
+        run: snyk iac test --report --severity-threshold=medium
         env:
           SNYK_TOKEN: ${{ secrets.ARC_SNYK_TOKEN }}