adjust wording

modules/linking.md

@@ -38,5 +38,5 @@ also execute the commands.
 
 Usually it is desirable to avoid rebuilding objects unnecessarily, especially
 when there is a large number of source files. This is usually done via set of
-rules that establish dependency. The most common tool for that is `make` and
+rules that establish dependencies. The most common tool for that is `make` and
 `Makefile` is its configuration file that drives the compilation.