Fixed markdown syntax.

README.md

@@ -88,7 +88,7 @@ a paper.  One solution to this issue is to embed the respective `.bib`
 file exist in `bibtexdir`, it gets embedded in the PDF.
 
 You can use the
-(bibutils)[https://sourceforge.net/p/bibutils/home/bib2xml/] for
+[bibutils](https://sourceforge.net/p/bibutils/home/bib2xml/) for
 converting between these different formats for bibliographic
 references easily.