fix reference

manuals/en/main/director-resource-job-definitions.tex

@@ -849,7 +849,7 @@
 directive: first, a failed job is defined as one that has not terminated
 normally, which includes any running job of the same name (you need to
 ensure that two jobs of the same name do not run simultaneously);
-secondly, the \linkResourceDirective{Dir}{FileSet}{Ignore FileSet Changes} directive is not considered
+secondly, the \linkResourceDirective{Dir}{FileSet}{Ignore File Set Changes} directive is not considered
 when checking for failed levels, which means that any FileSet change will
 trigger a rerun.
 }