Update README.md

Fix wrong spelling.

Author: steverao

jfr-events/README.md

@@ -5,7 +5,7 @@
 Create JFR events that can be recorded and viewed in Java Mission Control (JMC).
 
 * Creates Open Telemetry Tracing/Span events for spans
-  * The thread and stracktrace will be of the thead ending the span which might be different than the thread creating the span.
+  * The thread and stacktrace will be of the thead ending the span which might be different from the thread creating the span.
   * Has the fields
     * Operation Name
     * Trace ID