Fix typo in comments (#5891) [ci skip]

Signed-off-by: Robrecht Cannoodt <[email protected]>

Author: rcannood

modules/nextflow/src/main/groovy/nextflow/trace/TraceObserver.groovy

@@ -31,12 +31,12 @@ import java.nio.file.Path
 trait TraceObserver {
 
     /**
-     * The is method is invoked when the flow is going to start
+     * This method is invoked when the flow is going to start
      */
     void onFlowCreate(Session session) {}
 
     /**
-     * The is method is invoked when the flow is going to start
+     * This method is invoked when the flow is going to start
      */
     void onFlowBegin() {}