Bump actions/checkout from 4 to 5 (#799)

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 5.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/build_docs.yml

@@ -28,7 +28,7 @@
 
      steps:
        - name: Checkout repo
-         uses: actions/checkout@v4
+         uses: actions/checkout@v5
          with:
            fetch-depth: 0 # Fetch all history for all branches and tags.
 

.github/workflows/release_and_publish.yml

@@ -28,7 +28,7 @@
 
      steps:
        - name: Checkout repo
-         uses: actions/checkout@v4
+         uses: actions/checkout@v5
          with:
            fetch-depth: 0 # Fetch all history for all branches and tags.
 

.github/workflows/reverse.yml

@@ -16,7 +16,7 @@ jobs:
     name: Reverse dependency testing
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
             fetch-depth: 0
 

.github/workflows/unittests.yml

@@ -43,7 +43,7 @@ jobs:
 
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0 # Fetch all history for all branches and tags.