Merge pull request mackerelio#862 from mackerelio/go122

use go 1.22.x on build phase

Author: lufia

.github/workflows/test.yml

@@ -53,7 +53,7 @@ jobs:
             ${{ runner.os }}-go-
       - uses: actions/setup-go@v5
         with:
-          go-version: 1.20.x
+          go-version: 1.22.x
       - uses: actions/checkout@v4
       - run: make clean build rpm deb
       - uses: actions/upload-artifact@v4