Update mcp-server.mdx

fix typo

Author: markpollack

docs/sdk/java/mcp-server.mdx

@@ -26,7 +26,7 @@ Spring-specific transport implementations are available as an **optional** depen
 </Tip>
 
 <Tip>
-  This [quickstart demo](/quickstart/server), based on Spring AI MCP, you'll
+  This [quickstart demo](/quickstart/server), based on Spring AI MCP, will
   show you how to build an MCP server.
 </Tip>