Bump actions/checkout from 5.0.0 to 6.0.1

Bumps [actions/checkout](https://github.com/actions/checkout) from 5.0.0 to 6.0.1.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...8e8c483)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 6.0.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -40,7 +40,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
+      uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v5
 
     - name: Install clang-format
       run: |
@@ -62,7 +62,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
+      uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v5
 
     - name: Set up Bazel
       uses: bazel-contrib/setup-bazel@43d7d5ceab59a307da44fc7585faa2a2fff4f88d # 0.16.0

.github/workflows/citation-updater.yaml

@@ -61,7 +61,7 @@ jobs:
             core.setFailed('The release version and/or date could not be read')
 
       - name: Check out a copy of the git repository
-        uses: actions/checkout@ff7abcd0c3c05ccf6adc123a8cd1fd4fb30fb493 # v4.2.2
+        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v4.2.2
 
       - name: Verify that this repo has a CITATION.cff file
         id: check

.github/workflows/prerelease.yml

@@ -26,7 +26,7 @@ jobs:
   create_version:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@ff7abcd0c3c05ccf6adc123a8cd1fd4fb30fb493 # v4
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v4
       - uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v5
         with:
           python-version: '3.10'
@@ -49,7 +49,7 @@ jobs:
         os: [ubuntu-22.04, ubuntu-24.04, macos-14]
         python-version: ['3.10', '3.11', '3.12', '3.13']
     steps:
-    - uses: actions/checkout@ff7abcd0c3c05ccf6adc123a8cd1fd4fb30fb493 # v4
+    - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v4
     - name: Set up Python
       uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v5
       with:

.github/workflows/stable-release-workflow.yml

@@ -25,7 +25,7 @@ jobs:
   create_version:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@ff7abcd0c3c05ccf6adc123a8cd1fd4fb30fb493 # v4
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v4
       - uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v5
         with:
           python-version: '3.10'
@@ -49,7 +49,7 @@ jobs:
         python-version: ['3.10', '3.11', '3.12', '3.13']
 
     steps:
-    - uses: actions/checkout@ff7abcd0c3c05ccf6adc123a8cd1fd4fb30fb493 # v4
+    - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v4
     - name: Set up Python
       uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v5
       with: