ci: update workflow actions

Author: jianliang00

.github/workflows/ci.yml

@@ -10,13 +10,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out source
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Set up Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
           go-version-file: go.mod
-          cache: true
+          cache: false
 
       - name: Check formatting
         run: test -z "$(gofmt -l .)"