replay: ref onboarding snippet (#5926)

* replay: ref onboarding snippet

* Update src/platform-includes/session-replay/install-session-replay/javascript.mdx

* from review

* Apply suggestions from code review

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

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

Author: bruno-garcia

src/platform-includes/session-replay/install-session-replay/javascript.mdx

@@ -1,4 +1,4 @@
-Install the Replay package with NPM or your favourite package manager. Alternatively, you can load the Replay integration via a CDN bundle.
+Install the Replay package with the package manager of your choice. Alternatively, you can load the Replay integration using a CDN bundle:
 
 ```bash {tabTitle: ESM}
 # Make sure to have @sentry/browser or a Framework SDK (e.g. @sentry/react) installed

src/platform-includes/session-replay/setup-session-replay/javascript.mdx

@@ -25,7 +25,6 @@ Sentry.init({
       // See below for all available options
     })
   ],
-  // ...
 });
 ```
 
@@ -49,6 +48,12 @@ Sentry.init({
       // See below for all available options
     })
   ],
-  // ...
 });
 ```
+
+With the settings above, session replays with errors are always captured.
+You can verify that with the following:
+
+```javascript
+myUndefinedFunction();
+```

src/platforms/javascript/common/session-replay/index.mdx

@@ -45,9 +45,9 @@ Make sure to use the exact same version of `@sentry/replay` as your other Sentry
 
 <PlatformContent includePath="session-replay/setup-session-replay" />
 
-## Sessions
+## User Session
 
-A session starts when the Session Replay SDK is first loaded and initialized. The session will continue until 5 minutes passes without any user interactions with the application __OR__ until a maximum of 30 minutes have elapsed. Closing the browser tab will end the session immediately according to the rules for [SessionStorage](https://developer.mozilla.org/en-US/docs/Web/API/Window/sessionStorage).
+A user session starts when the Session Replay SDK is first loaded and initialized. The session will continue until five minutes passes without any user interactions with the application **or** until a maximum of 30 minutes have elapsed. Closing the browser tab will end the session immediately according to the rules for [SessionStorage](https://developer.mozilla.org/en-US/docs/Web/API/Window/sessionStorage).
 
 <Note>