actually fix broken anchors

Author: Blargian

docs/integrations/language-clients/java/jdbc/_snippets/_v0_8.mdx

@@ -1,8 +1,8 @@
 import Tabs from '@theme/Tabs';
 import TabItem from '@theme/TabItem';
 
-`clickhouse-jdbc` implements the standard JDBC interface using the latest [java client](/integrations/language-clients/java/client/client.md).
-We recommend using the latest [java client](/integrations/language-clients/java/client.md) directly if performance/direct access is critical.
+`clickhouse-jdbc` implements the standard JDBC interface using the latest [java client](/integrations/language-clients/java/client/client.mdx).
+We recommend using the latest [java client](/integrations/language-clients/java/client.mdx) directly if performance/direct access is critical.
 
 ## Changes from 0.7.x {#changes-from-07x}
 In 0.8 we tried to make the driver more strictly follow the JDBC specification, so there are some removed features that may affect you: