Bump actions/checkout from 5 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...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] <[email protected]>

Author: dependabot[bot]

.github/workflows/azure-static-web-app.yaml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ${{ matrix.platform }}
     timeout-minutes: 5
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up uv with caching enabled
         uses: astral-sh/setup-uv@v7
         with:

.github/workflows/docker-release.yaml

@@ -9,7 +9,7 @@ jobs:
     timeout-minutes: 10
     steps:
       - name: Check out the repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
       - name: Log in to Docker Hub

.github/workflows/docker.yaml

@@ -14,7 +14,7 @@ jobs:
     runs-on: "ubuntu-latest"
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0 # to retrieve git tags
       # How to set system path variable in github action workflow: https://stackoverflow.com/a/68214331

.github/workflows/ghcr-release.yaml

@@ -13,7 +13,7 @@ jobs:
       packages: write
       contents: read
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
       - uses: docker/login-action@v3

.github/workflows/github-pages.yaml

@@ -9,7 +9,7 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Configure Git Credentials
         run: |
           git config user.name github-actions[bot]

.github/workflows/news_summarizer_agent.yaml

@@ -47,7 +47,7 @@ jobs:
     runs-on: "ubuntu-latest"
     timeout-minutes: 5
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up uv with caching enabled
         uses: astral-sh/setup-uv@v7
         with:

.github/workflows/test.yaml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ${{ matrix.platform }}
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up uv with caching enabled
         uses: astral-sh/setup-uv@v7
         with: