Correction d'URL

README.md

@@ -4,6 +4,6 @@ songbook-data
 Songs data for LaTeX songbooks.
 
 This data is meant to be processed by the songbook toolkit:
-- [[command line client|songbook-core]]
-- [[gui client|songbook-gui]] (not up-to-date with this data)
-- [[web client|songbook-web]] work in progress.
+- [command line client](songbook-core)
+- [gui client](songbook-gui) (not up-to-date with this data)
+- [web client](songbook-web) work in progress.