Fix typo: 'choosen' should be 'chosen'.

core/src/main/resources/hudson/tasks/Messages.properties

@@ -22,7 +22,7 @@
 
 Ant.DisplayName=Invoke Ant
 Ant.ExecFailed=command execution failed.
-Ant.ExecutableNotFound=Cannot find executable from the choosen Ant installation "{0}"
+Ant.ExecutableNotFound=Cannot find executable from the chosen Ant installation "{0}"
 Ant.GlobalConfigNeeded= Maybe you need to configure where your Ant installations are?
 Ant.NotADirectory={0} is not a directory
 Ant.NotAntDirectory={0} doesn''t look like an Ant directory