Update link in README.md

Sorry for the noise, links with markdown notation don't seem to work in README.md.
fltk · May 24, 2020 · b1a2c28 · b1a2c28
1 parent e383e73
commit b1a2c28
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/README.md b/README.md
@@ -11,4 +11,5 @@
     currently maintained by a small group of developers across
     the world with a central repository in the US.
 
-    For more information see [README.txt](https://github.com/fltk/fltk/blob/master/README.txt).
+    For more information see README.txt:
+    https://github.com/fltk/fltk/blob/master/README.txt