Bump actions/setup-go from 5 to 6 (#728)

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] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/codeql.yml

@@ -35,7 +35,7 @@ jobs:
         uses: actions/checkout@v5
 
       - name: Setup Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
           go-version-file: go.mod
 

.github/workflows/main.yml

@@ -26,7 +26,7 @@ jobs:
         with:
           path: ${{ env.GOPATH }}/src/github.com/kubeflow/mpi-operator
       - name: Setup Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
           go-version-file: ${{ env.GOPATH }}/src/github.com/kubeflow/mpi-operator/go.mod
       - name: fmt check
@@ -51,7 +51,7 @@ jobs:
     - name: Clone the code
       uses: actions/checkout@v5
     - name: Setup Go
-      uses: actions/setup-go@v5
+      uses: actions/setup-go@v6
       with:
         go-version-file: go.mod
     - name: Run tests