Bump actions/checkout from 4 to 6 (#277)

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Craig Colegrove <34786857+giarc3@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/integration-test.yaml

@@ -17,13 +17,13 @@ jobs:
     runs-on: ubuntu-latest
     needs: get_ref
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-java@v5
         with:
           distribution: "temurin"
           java-version: "21"
       - name: clone the tsp
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           repository: IronCoreLabs/tenant-security-proxy
           ref: ${{ needs.get_ref.outputs.tsp_ref }}

.github/workflows/sdk-ci.yaml

@@ -24,7 +24,7 @@ jobs:
         # This should stay in sync with the `os_matrix` above
         runs-on: ["ubuntu-24.04", "ubuntu-24.04-arm", "macos-15-intel", "macos-14"]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-java@v5
         with:
           distribution: "temurin"
@@ -51,7 +51,7 @@ jobs:
         # This should stay in sync with the `os_matrix` above
         runs-on: ["ubuntu-24.04", "ubuntu-24.04-arm", "macos-15-intel", "macos-14"]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-java@v5
         with:
           distribution: "temurin"
@@ -79,7 +79,7 @@ jobs:
         # This should stay in sync with the `os_matrix` above and the `runs-on` from the other jobs in this file
         runs-on: ["ubuntu-24.04", "ubuntu-24.04-arm", "macos-15-intel", "macos-14"]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/download-artifact@v6
         with:
           name: ${{ join(matrix.runs-on) }}-

.github/workflows/sdk-release.yaml

@@ -19,7 +19,7 @@ jobs:
     needs: generate-cdylibs
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/download-artifact@v6
         with:
           path: ${{ github.workspace }}/kotlin/src/main/resources/
@@ -55,7 +55,7 @@ jobs:
     needs: generate-cdylibs
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-java@v5
         with:
           distribution: "temurin"
@@ -95,7 +95,7 @@ jobs:
     needs: generate-cdylibs
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/download-artifact@v6
         with:
           path: ${{ github.workspace }}/python/ironcore-alloy
@@ -133,7 +133,7 @@ jobs:
     needs: [kotlin-release, python-release, java-release, rust-release]
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           ref: ${{ github.event.release.tag_name }}
       - name: Mark GitHub release as not prerelease