always use latest stable go

.github/workflows/go.yml

@@ -15,14 +15,14 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
 
-    - name: Set up Go 1.18
-      uses: actions/setup-go@v1
+    - name: Set up Go
+      uses: actions/setup-go@v4
       with:
-        go-version: 1.18
+        go-version: stable
       id: go
 
     - name: Check out code into the Go module directory
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
     - name: Test
       run: |