chore(deps): Bump actions/checkout from 5 to 6 (#20)

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

Author: dependabot[bot]

.github/workflows/get_version.yml

@@ -30,7 +30,7 @@ jobs:
       with:
         version: 'snapshot'
 
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - name: Expose Version
       id: expose-ver

.github/workflows/test.yml

@@ -35,7 +35,7 @@ jobs:
           experimental: true
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - uses: jcs090218/setup-emacs@master
       with:

.github/workflows/update_bundle_version.yml

@@ -30,7 +30,7 @@ jobs:
       with:
         version: 'snapshot'
 
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - name: Expose bundle version
       run: |