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]>

.github/workflows/chatops.yml

@@ -9,7 +9,7 @@ jobs:
     if: startsWith(github.event.comment.body, '/')
     steps:
       - name: Checkout ChatOps repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: BSData/chatops
           path: chatops

.github/workflows/ci.yml

@@ -7,7 +7,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - uses: BSData/check-datafiles@v1
       id: check

.github/workflows/publish-catpkg.yml

@@ -9,5 +9,5 @@ jobs:
   publish:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: BSData/publish-catpkg@v1