Improve CI workflow

Author: andyone

.github/workflows/ci.yml

@@ -29,7 +29,7 @@ jobs:
 
     strategy:
       matrix:
-        go: [ '1.18.x', '1.19.x', '1.20.x', '1.21.x' ]
+        go: [ '1.21.x', '1.22.x' ]
 
     steps:
       - name: Checkout
@@ -82,7 +82,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.20.x'
+          go-version: '1.21.x'
 
       - name: Check Golang sources with Aligo
         uses: essentialkaos/aligo-action@v2