Bump version to 1.7.2+9

Co-Authored-By: Mithun Gowda B <mithungowda.b7411@gmail.com>

Author: mithun50

flutter_app/pubspec.yaml

@@ -1,7 +1,7 @@
 name: openclaw
 description: OpenClaw AI Gateway for Android - standalone, no Termux required.
 publish_to: 'none'
-version: 1.7.1+8
+version: 1.7.2+9
 
 environment:
   sdk: '>=3.2.0 <4.0.0'