Update website/docs/en/guide/migration/tsup.mdx

Co-authored-by: Wei <[email protected]>

Author: chenjiahan

website/docs/en/guide/migration/tsup.mdx

@@ -4,7 +4,7 @@ This section introduces how to migrate a project using tsup to Rslib.
 
 ## Installing Dependencies
 
-First, you need to replace the npm dependencies of webpack with Rslib's dependencies.
+First, you need to replace the npm dependencies of tsup with Rslib's dependencies.
 
 import { PackageManagerTabs } from '@theme';