- mark the findCaller 2-element tuple/3-element tuple change as new in 2.4

Doc/lib/liblogging.tex

@@ -519,7 +519,7 @@ Removes the specified handler \var{hdlr} from this logger.
 Finds the caller's source filename and line number. Returns the filename,
 line number and function name as a 3-element tuple.
 \versionchanged[The function name was added. In earlier versions, the
-filename and line number were returned as a 2-element tuple.]{2.5}
+filename and line number were returned as a 2-element tuple.]{2.4}
 \end{methoddesc}
 
 \begin{methoddesc}{handle}{record}