Fix typo

Author: danbarr

docs/toolhive/guides-cli/install.mdx

@@ -158,8 +158,8 @@ brew upgrade thv
 :::note
 
 On Windows, you must stop all running MCP servers before upgrading ToolHive,
-otherwise the upgrade will fail because the Windows locks the executable is
-locked while it runs.
+otherwise the upgrade will fail because the Windows locks the executable while
+it runs.
 
 Run `thv stop <server-name>` to stop each server. After you complete the
 upgrade, restart them using `thv restart <server-name>`.