Update actions/setup-go action to v6

Author: renovate[bot]

.github/workflows/go.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Set up Go
-      uses: actions/setup-go@v3
+      uses: actions/setup-go@4a3601121dd01d1626a1e23e37211e3254c1c06c # v6
       with:
         go-version: 1.21