Update change-notes/1.24/analysis-java.md

Co-Authored-By: Felicity Chapman <felicitymay@github.com>

Author: aschackmull

change-notes/1.24/analysis-java.md

@@ -15,11 +15,10 @@ The following changes in version 1.24 affect Java analysis in all applications.
 
 ## Changes to libraries
 
-* Identification of test classes have been improved. Previously, one of the
+* Identification of test classes has been improved. Previously, one of the
   match conditions would classify any class with a name containing the string
   "Test" as a test class, but now this matching has been replaced with one that
   looks for the occurrence of actual unit-test annotations. This affects the
   general file classification mechanism and thus suppression of alerts, and
   also any security queries using taint tracking, as test classes act as
   default barriers stopping taint flow.
-