Updated docs for heat maps beta (#1845)

Co-authored-by: Carlos Trevino <carlostrevino@vhhf74m7m4-carlostrevino.corp.mixpanel.com>

Author: carlosdanieltt

pages/docs/session-replay.mdx

@@ -101,7 +101,7 @@ Heatmaps are currently in private, closed beta. For early access, please contact
 Heatmaps are powered by session replay data and automatically capture click interactions when enabled. Users can generate heatmaps for specific pages to get deeper insights into user engagement.
 
 ### Implementation
-Ensure you have Session Replay set up, and click interaction tracking enabled. Session Replays are required for Heatmaps to work. 
+Ensure you have Session Replay set up, and [click interaction tracking enabled](/docs/tracking-methods/sdks/javascript#heatmaps-beta). Session Replays are required for Heatmaps to work. 
 
 Note: if you already utilize Mixpanel's [autocapture functionality](/docs/tracking-methods/autocapture) to capture clicks, then these clicks can be used to populate Heatmaps
 

pages/docs/tracking-methods/sdks/javascript.mdx

@@ -947,7 +947,13 @@ Note: This is the only change needed in your existing JavaScript SDK setup to en
 | `record_min_ms` | Minimum length of a single replay in milliseconds. Up to 8 seconds is supported. If a replay does not meet the minimum length, it will be discarded. | `0`<br/>(0 seconds) |
 | `record_sessions_percent` | Percentage of SDK initializations that will qualify for replay data capture. A value of "1" = 1%. | `0` |
 | `record_canvas` | When true, Mixpanel will record snapshots of `<canvas>` elements on your site at up to 15 frames per second | `false` |
+| `record_heatmap_data` | When true, Mixpanel will capture click events during replays to populate heatmaps.  Viewing heatmaps is currently in Beta. | `false` |
 
+### Heatmaps (Beta)
+
+In order to collect data to populate heatmaps, use the `record_heatmap_data` init option.
+
+Note that heatmaps are currently in private, closed beta. For early access, please contact your Account Manager.
 
 ### Session Replay Methods