CI: use latest actions versions (#420)

Author: nosovk

.github/workflows/main.yml

@@ -7,10 +7,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v1
+        uses: actions/checkout@v3
 
       - name: Setup Node
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v3
         with:
           node-version: '14.x'