build(deps): 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] <[email protected]>

Author: dependabot[bot]

.github/workflows/test.yml

@@ -26,7 +26,7 @@ jobs:
 
     steps:
     - uses: actions/checkout@v5
-    - uses: actions/setup-go@v5
+    - uses: actions/setup-go@v6
       with:
         go-version: ${{ matrix.go-version }}
     - run: go test -timeout 3m ${{ matrix.race }} -v ./...

.github/workflows/validate.yml

@@ -27,7 +27,7 @@ jobs:
       - uses: actions/checkout@v5
         with:
           fetch-depth: 2
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@v6
         with:
           go-version: "${{ env.GO_VERSION }}"
       - uses: golangci/golangci-lint-action@v8
@@ -45,7 +45,7 @@ jobs:
       - uses: actions/checkout@v5
         with:
           fetch-depth: 2
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@v6
         with:
           go-version: "${{ env.GO_VERSION }}"
       - name: run go fix
@@ -73,7 +73,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
     - uses: actions/checkout@v5
-    - uses: actions/setup-go@v5
+    - uses: actions/setup-go@v6
       with:
         go-version: "${{ env.GO_VERSION }}"
     - run: go mod tidy --diff