chore(deps): bump actions/checkout from 4 to 5

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 5.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/build.yaml

@@ -18,7 +18,7 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version: ${{ env.GO_VERSION }}
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - run: go vet $(go list ./... | grep -v /vendor/)
 
   test:
@@ -28,7 +28,7 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version: ${{ env.GO_VERSION }}
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - run: go test $(go list ./... | grep -v /vendor/)
 
   golangci:
@@ -38,7 +38,7 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version: ${{ env.GO_VERSION }}
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 1
       - uses: golangci/golangci-lint-action@v8
@@ -52,7 +52,7 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version: ${{ env.GO_VERSION }}
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 1
       - uses: dominikh/staticcheck-action@v1.4.0
@@ -72,6 +72,6 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version: ${{ env.GO_VERSION }}
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - run: go mod vendor
       - run: go build -mod=vendor -ldflags "-X 'main.Version=${{ github.ref_name }}' -extldflags '-static'" -o calendarsync cmd/calendarsync/main.go

.github/workflows/release.yaml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
       - name: Set up Go