Bump the ci-dependencies group with 2 updates (#3487)

Bumps the ci-dependencies group with 2 updates: [actions/checkout](https://github.com/actions/checkout) and [azure/setup-kubectl](https://github.com/azure/setup-kubectl).


Updates `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)

Updates `azure/setup-kubectl` from 4 to 5
- [Release notes](https://github.com/azure/setup-kubectl/releases)
- [Changelog](https://github.com/Azure/setup-kubectl/blob/main/CHANGELOG.md)
- [Commits](Azure/setup-kubectl@v4...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: ci-dependencies
- dependency-name: azure/setup-kubectl
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: ci-dependencies
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/build-deploy.yml

@@ -16,7 +16,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       # The current version (v2) of Docker's build-push action uses
       # buildx, which comes with BuildKit features that help us speed
@@ -61,12 +61,12 @@ jobs:
     environment: production
     steps:
       - name: Checkout Kubernetes repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           repository: python-discord/infra
           path: infra
 
-      - uses: azure/setup-kubectl@v4
+      - uses: azure/setup-kubectl@v5
 
       - name: Authenticate with Kubernetes
         uses: azure/k8s-set-context@v4

.github/workflows/lint-test.yml

@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install uv
         uses: astral-sh/setup-uv@v7

.github/workflows/sentry_release.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Create a Sentry.io release
         uses: getsentry/action-release@v3