Merge pull request #555 from OpenEVSE/dependabot/github_actions/actions/checkout-3

Bump actions/checkout from 2 to 3

Author: jeremypoulter

.github/workflows/release_validation.yaml

@@ -12,7 +12,7 @@ jobs:
     name: Pre-built GUI Validation
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           submodules: recursive
 
@@ -49,7 +49,7 @@ jobs:
 
     steps:
       ### Check the version number in the code matches the tag number
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Retrieve the version number(s)
         run: |