Update rum/intro-to-rum.rst

Author: jcatera-splunk

rum/intro-to-rum.rst

@@ -46,7 +46,7 @@ If you want to monitor your application from browser to back-end, then integrate
 
 If a span in Splunk RUM has an associated back-end span, an :guilabel:`APM` link appears next to the span in the waterfall view and opens the span details page in Splunk APM.  
 
-By default, the Splunk Distribution of OpenTelemetry already send the ``Server-Timing`` header. The header links spans from the browser with back-end spans and traces.
+By default, the Splunk Distribution of OpenTelemetry already sends the ``Server-Timing`` header. The header links spans from the browser with back-end spans and traces.
 
 Splunk RUM for Browser uses the server-timing header response times to associate the RUM span with the corresponding APM trace. The APM environment variable for controlling the ``Server-Timing`` header  is ``SPLUNK_TRACE_RESPONSE_HEADER_ENABLED=true``. Set ``SPLUNK_TRACE_RESPONSE_HEADER_ENABLED=true`` to link to Splunk APM.