[RUM-7047] Update the doc about the force session replay recording (#…

…26745)

* update force session replay

* update force session replay

* title

content/en/real_user_monitoring/session_replay/browser/_index.md

@@ -73,6 +73,14 @@ To stop the Session Replay recording, call `stopSessionReplayRecording()`.
 
 <div class="alert alert-warning">When using a version of the RUM Browser SDK older than v5.0.0, Session Replay recording does not begin automatically. Call <code>startSessionReplayRecording()</code> to begin recording.</div>
 
+## Force Session Replay
+
+In some scenarios, you may want to begin recording a session after it has already started, even if it was initially sampled out of replay. For instance, you might want to force Session Replay on a newly deployed page for closer monitoring, or start recording after detecting an error to ensure complete replay data.
+
+To force Session Replay recording for the rest of the current session, call `startSessionReplayRecording({ force: true })`
+
+When using the force option, the session is upgraded to a replayed session for the remainder of its duration, regardless of its initial sampling decision.
+
 ## Disable Session Replay
 
 To stop session recordings, set `sessionReplaySampleRate` to `0`. This stops collecting data for the [Browser RUM & Session Replay plan][6].