CI: use Go 1.22

Author: sywhang

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
     - uses: actions/setup-go@v5
       name: Set up Go
       with:
-        go-version: 1.21.x
+        go-version: 1.22.x
         cache: false  # managed by golangci-lint
 
     - uses: golangci/golangci-lint-action@v4
@@ -51,7 +51,7 @@ jobs:
     strategy:
       matrix:
         os: ["ubuntu-latest"]
-        go: ["1.20.x", "1.21.x"]
+        go: ["1.21.x", "1.22.x"]
 
     steps:
     - name: Checkout code