Update README.md
wrong link to source file dcgs.pl
@@ -272,7 +272,7 @@ the exact same internal representation, and has the advantage that
only the standard predicate&nbsp;`(=)/2` is used.
Definite clause grammars as provided by
-[`library(dcgs)`](src/lib/lists.pl), and the predicates from
+[`library(dcgs)`](src/lib/dcgs.pl), and the predicates from
[`library(lists)`](src/lib/lists.pl), are ideally suited for reasoning
about strings.
