chore(deps): update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/build.yml

@@ -15,7 +15,7 @@ jobs:
         otp: ["27", "28"]
       fail-fast: false
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: erlef/setup-beam@v1
         id: setup-beam
         with:
@@ -49,7 +49,7 @@ jobs:
     needs: build_and_test
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Bump version and push tag
         id: tag_version
         uses: mathieudutour/github-tag-action@v6.2