Bump actions/checkout from 3 to 4 (#1064)

Author: dependabot[bot]

.github/workflows/main.yml

@@ -242,6 +242,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Check semver
         uses: obi1kenobi/cargo-semver-checks-action@v2