build: 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](https://github.com/actions/setup-go/compare/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>

.github/workflows/build.yml

@@ -100,7 +100,7 @@ jobs:
           fetch-depth: 0
 
       - name: Install Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
           go-version: ${{ matrix.go }}
           check-latest: true
@@ -222,7 +222,7 @@ jobs:
 
       - name: Install Go
         id: setup-go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
           go-version: '>=1.24.0-rc.1'
           check-latest: true
@@ -311,7 +311,7 @@ jobs:
 
       # Upgrade together with NDK version
       - name: Set up Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
           go-version: '>=1.25.0-rc.1'