Bump actions/setup-go from 5 to 6

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>

Author: dependabot[bot]

.github/workflows/golangci-lint.yml

@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v5
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@v6
         with:
           go-version: stable
       - name: golangci-lint

.github/workflows/sanity.yml

@@ -18,7 +18,7 @@ jobs:
             goarch: amd64
     steps:
     - uses: actions/checkout@v5
-    - uses: actions/setup-go@v5
+    - uses: actions/setup-go@v6
       with:
         go-version: ${{ env.GO_VERSION }}
     - name: Install golint
@@ -39,7 +39,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v5
-    - uses: actions/setup-go@v5
+    - uses: actions/setup-go@v6
       with:
         go-version: ${{ env.GO_VERSION }}
     - name: Test
@@ -60,7 +60,7 @@ jobs:
             goarch: amd64
     steps:
       - uses: actions/checkout@v5
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@v6
         with:
           go-version: ${{ env.GO_VERSION }}
       - name: Build