journey test: fix comment typo

bin/journey-test.sh

 #!/usr/bin/env bash
 
 # This script is shared between the Java and Kotlin tracks.  If you make an update to this script on
-# on track, please create a companion PR to merge it in to the other.  Thank you!
+# one track, please create a companion PR to merge it in to the other.  Thank you!
 TRACK=java
 TRACK_REPO="x${TRACK}"
 TRACK_SRC_EXT="java"