Bump actions/setup-go from 5 to 6 (#866)

Bumps [actions/setup-go](https://github.com/actions/setup-go) from 5 to 6.
- [Release notes](https://github.com/actions/setup-go/releases)
- [Commits](actions/setup-go@v5...v6)

---
updated-dependencies:
- dependency-name: actions/setup-go
  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/test.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     name: Check modules
     steps:
-    - uses: actions/setup-go@v5
+    - uses: actions/setup-go@v6
       with:
         go-version: 'oldstable'
     - uses: actions/checkout@v5
@@ -19,7 +19,7 @@ jobs:
         version: [ 'oldstable', 'stable' ]
     name: Go ${{ matrix.version }}
     steps:
-    - uses: actions/setup-go@v5
+    - uses: actions/setup-go@v6
       with:
         go-version: ${{ matrix.version }}
     - uses: actions/checkout@v5