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

Author: renovate[bot]

.github/workflows/pull-request.yaml

@@ -21,7 +21,7 @@ jobs:
     - uses: actions/checkout@v5
 
     - name: Setup Go
-      uses: actions/setup-go@v5
+      uses: actions/setup-go@v6
       with:
         go-version-file: 'go.mod'