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](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/llgo.yml

@@ -87,7 +87,7 @@ jobs:
           echo "LLGO_ROOT=$GITHUB_WORKSPACE" >> $GITHUB_ENV
 
       - name: Set up Go for testing
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
           go-version: ${{matrix.go}}
 
@@ -166,7 +166,7 @@ jobs:
           echo "LLGO_ROOT=$GITHUB_WORKSPACE" >> $GITHUB_ENV
 
       - name: Set up Go for testing
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
           go-version: ${{matrix.go}}