Apply suggestions from code review

Co-authored-by: Chris Smowton <smowton@github.com>

java/ql/lib/semmle/code/java/security/SensitiveLoggingQuery.qll

@@ -13,7 +13,7 @@ class VariableWithSensitiveName extends Variable {
     exists(string name | name = this.getName() |
       name.regexpMatch(getCommonSensitiveInfoRegex()) and
       not name.regexpMatch("(?i).*null.*") and
-      not name.matches("tokenImage") // appears in parser code generated by JavaCC
+      name != "tokenImage" // appears in parser code generated by JavaCC
     )
   }
 }