Fix typo of homepage url in pubspec.yml (#168)

diff --git a/packages/xdg_directories/pubspec.yaml b/packages/xdg_directories/pubspec.yaml
index 7c43887..02b47b3 100644
--- a/packages/xdg_directories/pubspec.yaml
+++ b/packages/xdg_directories/pubspec.yaml
@@ -1,7 +1,7 @@
 name: xdg_directories
 description: A Dart package for reading XDG directory configuration information on Linux.
 version: 0.1.0
-homepage: https://github.com/flutter/packages/tree/master/packages/animations
+homepage: https://github.com/flutter/packages/tree/master/packages/xdg_directories
 
 environment:
   sdk: ">=2.3.0 <3.0.0"