ci: bump actions/checkout from 4.1.5 to 4.1.6

Bumps [actions/checkout](https://github.com/actions/checkout) from 4.1.5 to 4.1.6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@44c2b7a...a5ac7e5)

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

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/tests.yml

@@ -22,7 +22,7 @@ jobs:
       with:
         go-version: ${{ matrix.go-version }}
     - name: Checkout code
-      uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b
+      uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29
     - name: Build
       run: make
     - name: Run static checks
@@ -49,7 +49,7 @@ jobs:
       with:
         go-version: ${{ matrix.go-version }}
     - name: Checkout code
-      uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b
+      uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29
     - name: Build
       working-directory: ./cmd
       run: make
@@ -80,7 +80,7 @@ jobs:
       with:
         go-version: ${{ matrix.go-version }}
     - name: Checkout code
-      uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b
+      uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29
     - name: Build
       working-directory: ./flow
       run: make