update mariadb-connector to 3.4.8

Author: methane

.github/workflows/windows.yaml

@@ -10,7 +10,7 @@ jobs:
   build:
     runs-on: windows-latest
     env:
-      CONNECTOR_VERSION: "3.4.1"
+      CONNECTOR_VERSION: "3.4.8"
     steps:
       - name: Cache Connector
         id: cache-connector