chore: update go version in ci workflow

Update the Go version used in the GitHub workflow to 1.23.0.

Author: google-labs-jules[bot]

.github/workflows/go-test.yml

@@ -13,7 +13,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v3
       with:
-        go-version: '1.18'
+        go-version: '1.23.0'
 
     - name: Test
       run: go test -v ./...