[ffigen] Update README.md (#97)

pkgs/ffigen/README.md

diff --git a/pkgs/ffigen/README.md b/pkgs/ffigen/README.md
index 4309bfc..20ff335 100644
--- a/pkgs/ffigen/README.md
+++ b/pkgs/ffigen/README.md
@@ -36,7 +36,7 @@
 typedef _dart_sum = int Function(int a,int b);
 ```
 ## Using this package
-- Add this package as dev_dependency in your `pubspec.yaml`.
+- Add `ffigen` under `dev_dependencies` in your `pubspec.yaml`.
 - Setup for use (see [Setup](#Setup)).
 - Configurations must be provided in `pubspec.yaml` or in a custom YAML file (see [configurations](#configurations)).
 - Run the tool- `pub run ffigen`.