bump GHA checkout module version to v2

Author: lukaszstolarczuk

.github/workflows/gha.yml

@@ -35,7 +35,9 @@ jobs:
                 "N=10 OS=ubuntu OS_VER=19.10 TYPE=coverity"]
     steps:
        - name: Clone the git repo
-         uses: actions/checkout@v1
+         uses: actions/checkout@v2
+         with:
+            fetch-depth: 50
 
        - name: Change ownership of the repo
          run: sudo chown -R 1000.1000 $HOST_WORKDIR
@@ -85,7 +87,9 @@ jobs:
             key:  vcpkg-installed-45e5a67
 
        - name: Clone the git repo
-         uses: actions/checkout@v1
+         uses: actions/checkout@v2
+         with:
+            fetch-depth: 50
 
        - name: Use old vcpkg for pmdk to build properly
          working-directory: C:/vcpkg