Merge pull request #732 from vshymanskyy/dependabot/github_actions/actions/checkout-3

ci: bump actions/checkout from 2 to 3

.github/workflows/build_examples_platformio.yaml

@@ -41,7 +41,7 @@ jobs:
           ]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Set variables
         run: |