Update local.txt (#1791)

Author: myronkaifung

redirects/local.txt

@@ -267,3 +267,4 @@
 /docs/tracking-methods/data-warehouse /docs/tracking-methods/warehouse-connectors
 /docs/boards/advanced /docs/boards
 /docs/quickstart/track-events /docs/quickstart/capture-events/track-events
+/docs/session-replay/session-replay-web#server-side-stitching-beta /docs/session-replay#server-side-stitching