Update cli CI checkout to v2 (#8823)

.github/workflows/cli.yml

@@ -19,7 +19,7 @@ jobs:
     container: qmkfm/base_container
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
       with:
         submodules: recursive
     - name: Install dependencies