Update actions setup-go and checkout to v4.

Signed-off-by: Lan Liang <[email protected]>

.github/workflows/test.yaml

@@ -10,12 +10,12 @@ jobs:
 
     steps:
     - name: Set up Go 1.x
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v4
       with:
         go-version: 1.21
 
     - name: Check out code into the Go module directory
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
     - name: Get dependencies
       run: go get -v -t -d ./...