chore: update ci.yml actions/checkout to v3

Author: Meir017

.github/workflows/ci.yml

@@ -7,7 +7,7 @@ jobs:
         os: [ubuntu-latest, windows-latest, macos-latest]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 0
       - name: Setup .NET 6