Update go action

Author: lpetrora

.github/workflows/ci.yml

@@ -102,9 +102,9 @@ jobs:
           name: '${{ needs.build.outputs.signed-plugin-name }}'
 
       - name: Setup Go environment
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v5
         with:
-          go-version: '1.19'
+          go-version: '1.21'
 
       - name: Install validator
         run: |