fix GHA example error and warning

github-actions/ci-scripts-build.yml.example-mini

@@ -31,6 +31,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
+      include:
         - os: ubuntu-18.04
           cmp: gcc
           configuration: default
@@ -68,7 +69,7 @@ jobs:
           name: "3.15 Ub-20 clang-10"
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
       with:
         submodules: true
     - name: Prepare and compile dependencies