build(deps): bump actions/checkout from 5 to 6 (#2287)

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](https://github.com/actions/checkout/compare/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] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/ci.yaml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Free Disk Space
         uses: jlumbroso/free-disk-space@main
         with:
@@ -39,7 +39,7 @@ jobs:
       matrix:
         helm-version: [v3.18.6, v3.19.2, v4.0.0]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: Free Disk Space
@@ -127,7 +127,7 @@ jobs:
             plugin-diff-version: 3.14.1
             extra-helmfile-flags: '--enable-live-output'
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Free Disk Space
         uses: jlumbroso/free-disk-space@main
         with:
@@ -175,7 +175,7 @@ jobs:
     needs: tests
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - uses: actions/download-artifact@v6

.github/workflows/images.yaml

@@ -39,7 +39,7 @@ jobs:
             suffix: "-ubuntu"
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 

.github/workflows/releaser.yaml

@@ -22,7 +22,7 @@ jobs:
   goreleaser:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: check disk usage