chore(deps): update actions/checkout action to v3 (#31)

Co-authored-by: Renovate Bot <[email protected]>

Author: renovate[bot]

.github/workflows/update-copyright-years-in-license-file.yml

@@ -8,7 +8,7 @@ jobs:
   run:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
       with:
         fetch-depth: 0
     - uses: FantasticFiasco/action-update-license-year@v2