Bump actions/checkout from 3 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

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

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

Author: dependabot[bot]

.github/workflows/custom_acceptance.yml

@@ -39,7 +39,7 @@ jobs:
     steps:
 
       - name: "checkout"
-        uses: "actions/checkout@v3"
+        uses: "actions/checkout@v4"
 
       - name: "export environment"
         run: |

.github/workflows/release.yml

@@ -22,7 +22,7 @@ jobs:
     steps:
 
       - name: "Checkout"
-        uses: "actions/checkout@v3"
+        uses: "actions/checkout@v4"
         with:
           ref: "${{ github.ref }}"
           clean: true

.github/workflows/release_prep.yml

@@ -26,7 +26,7 @@ jobs:
     steps:
 
       - name: "Checkout"
-        uses: "actions/checkout@v3"
+        uses: "actions/checkout@v4"
         with:
           ref: 'release-prep'
           fetch-depth: 0