Update actions/checkout@v2 to actions/checkout@v3 (#1015)

Author: ShadowMitia

.github/workflows/build.yml

@@ -12,7 +12,7 @@ jobs:
         shell: bash --rcfile /root/.bashrc -eo pipefail {0} 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           persist-credentials: false