Bump actions/checkout from 5 to 6 (#3804)

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/appinspect.yml

@@ -8,7 +8,7 @@ jobs:
     steps:
       - name: Check out repository (PR)
         if: ${{ github.event_name == 'pull_request' }}
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           ref: refs/pull/${{ github.event.pull_request.number }}/merge
 

.github/workflows/build.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out the repository code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - uses: actions/setup-python@v6
         with:

.github/workflows/datasource-dependabot.yml

@@ -11,7 +11,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           ref: 'develop'
           token: ${{ secrets.DATA_SOURCES_DEPENDABOT }}

.github/workflows/labeler.yml

@@ -9,7 +9,7 @@ jobs:
       pull-requests: write
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with: 
         repository: "splunk/security_content"
     - uses: actions/labeler@v6

.github/workflows/unit-testing.yml

@@ -9,7 +9,7 @@ jobs:
     steps:
         #For fork PRs, always check out security_content and the PR target in security content!
         - name: Check out the repository code
-          uses: actions/checkout@v5
+          uses: actions/checkout@v6
           with:
             repository: 'splunk/security_content' #this should be the TARGET repo of the PR. we hardcode it for now
             ref: ${{ github.base_ref }}