chore(deps): update actions/setup-go action to v5

Author: renovate-rancher[bot]

.github/workflows/unitest.yaml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
-    - uses: actions/setup-go@v2
+    - uses: actions/setup-go@v5
       with:
         go-version: '1.22.3'
     - run: |