chore(deps): update actions/setup-go action to v6

Author: renovate[bot]

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - uses: actions/setup-go@v4
+    - uses: actions/setup-go@v6
       with:
         go-version: '1.21'
     - run: make