[jnigen] Update pubspec.yaml (https://github.com/dart-lang/jnigen/issues/58)

pkgs/jnigen/pubspec.yaml

diff --git a/pkgs/jnigen/pubspec.yaml b/pkgs/jnigen/pubspec.yaml
index 3feb9e3..769fbff 100644
--- a/pkgs/jnigen/pubspec.yaml
+++ b/pkgs/jnigen/pubspec.yaml
@@ -4,8 +4,8 @@
 
 name: jnigen
 version: 0.1.0
-homepage: https://github.com/dart-lang/jnigen
 description: Experimental generator for FFI+JNI bindings.
+repository: https://github.com/dart-lang/jnigen/tree/main/jnigen
 
 environment:
   sdk: '>=2.17.0 <3.0.0'