chore(deps): 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/build.yml

@@ -65,7 +65,7 @@ jobs:
 
     steps:
       - name: 🛎️ Check out the source code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
@@ -190,7 +190,7 @@ jobs:
 
     steps:
       - name: 🛎️Check out the source code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
           submodules: recursive

.github/workflows/jextract.yml

@@ -30,7 +30,7 @@ jobs:
 
     steps:
       - name: 🛎️ Check out the source code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: ⚙ Set OS, Arch and Package
         run: jextract/gen/script/set-package.sh
@@ -71,7 +71,7 @@ jobs:
     needs: jextract
     steps:
       - name: 🛎️ Check out the source code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: 🧹 Clean up jextract src
         run: rm -rf jextract/src || true

.github/workflows/sync-labels.yml

@@ -15,7 +15,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           sparse-checkout: .github/config/labels.yml