fix typo in README; see http://nagoya.apache.org/bugzilla/show_bug.cgi?id=25080

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@197026 13f79535-47bb-0310-9956-ffa450edef68

README

@@ -8,7 +8,7 @@ FOP readme
     directly on screen.
 
     FOP is part of Apache's XML project. The homepage of FOP is
-    http:/xml.apache.org/fop
+    http://xml.apache.org/fop
 
     HTML-Documentation can be found in the subdirectory xml-fop/docs/html-docs.