Fix link

Author: mikepack

getting_started/6.markdown

@@ -19,7 +19,7 @@ Sigils starting with an uppercase letter never escape characters or do interpola
 
     %b-another binary-
 
-Internally, `%b` is translated as a function call to `__b__`. For instance, the docs for `%b` are available [in the function `__b__/1` defined in `Kernel` module](/docs/stable/Kernel.html#__b__/1).
+Internally, `%b` is translated as a function call to `__b__`. For instance, the docs for `%b` are available [in the function `__b__/2` defined in `Kernel` module](/docs/stable/Kernel.html#__b__/2).
 
 The sigils defined in Elixir by default are: