Switch to Go 1.23 for GH Actions

Author: nitram509

.github/workflows/go-test.yml

@@ -5,7 +5,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go: [ '1.20', '1.21', '1.22']
+        go: [ '1.23', '1.24']
     name: Go ${{ matrix.go }} test
     steps:
       - name: checkout