Make transition smoother for thirdPartyErrorFilterIntegration paragraph (#11061)

Author: Luca Forstner

docs/platforms/javascript/common/configuration/filtering.mdx

@@ -100,7 +100,8 @@ This integration works by "marking" your JavaScript files with an "application k
 At runtime, if an error occurs, this integration checks application keys for each stack frame in the stack trace.
 This allows you to filter out errors with "unmarked" stack frames, which would indicate third-party code.
 
-To set up this integration, first pass an `applicationKey` to your Sentry bundler plugin. This can be an arbitrary string that identifies your application code:
+To set up this integration and to mark your JavaScript files with an application key, first pass an `applicationKey` option to your Sentry bundler plugin.
+This can be an arbitrary string that identifies your application code:
 
 ```ts {tabTitle:Vite} {8}
 // vite.config.ts