add note on client instrumentation

Author: chargome

docs/platforms/javascript/guides/nextjs/manual-setup.mdx

@@ -87,7 +87,13 @@ export default withSentryConfig(nextConfig, {
 
 ### Initialize Sentry Client-Side and Server-Side SDKs
 
-Create three files in your application's root directory: `sentry.server.config.(js|ts)`, `sentry.edge.config.(js|ts)`, and `instrumentation-client.(js|ts)`. Add the following initialization code into each respective file:
+Create three files in your application's root directory:
+- `sentry.server.config.(js|ts)`
+- `sentry.edge.config.(js|ts)`
+- `instrumentation-client.(js|ts)`
+  - If you previously had file called `sentry.client.config.(js|ts)`, you can also safely rename this to `instrumentation-client.(js|ts)` for all Next.js versions.
+
+Add the following initialization code into each respective file:
 
 <Alert level="info" title="Note">
   These files run in different environments (browser, server, edge) and are
@@ -112,8 +118,8 @@ Sentry.init({
   // https://docs.sentry.io/platforms/javascript/configuration/options/#traces-sample-rate
   tracesSampleRate: 1.0,
   // ___PRODUCT_OPTION_END___ performance
-  // Replay may only be enabled for the client-side
   // ___PRODUCT_OPTION_START___ session-replay
+  // Replay may only be enabled for the client-side
   integrations: [Sentry.replayIntegration()],
 
   // Capture Replay for 10% of all sessions,
@@ -188,7 +194,7 @@ Sentry.init({
 });
 ```
 
-<Alert level="success" title="Tip">
+<Alert title="Tip">
   Include your DSN directly in these files, or use a _public_ environment variable like `NEXT_PUBLIC_SENTRY_DSN`.
 </Alert>