fix: security.yml for checlout action

.github/workflows/security.yml

@@ -10,10 +10,10 @@ jobs:
   security:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
-    - name: Run Snyk to check for vulnerabilities
-      uses: snyk/actions/golang@v1
-      env:
-        SNYK_TOKEN: ${{ secrets.SNYK_TOKEN }}
-      with:
-        args: --severity-threshold=high
+      - uses: actions/checkout@master
+      - name: Run Snyk to check for vulnerabilities
+        uses: snyk/actions/golang@master
+        env:
+          SNYK_TOKEN: ${{ secrets.SNYK_TOKEN }}
+        with:
+          args: --severity-threshold=high