chore: bump app version to 1.13.1+1

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: SERDUN

pubspec.yaml

@@ -14,7 +14,7 @@ version: 0.0.0+0000000
 # Where:
 #   - <Major>, <Minor>, <Patch>: non-negative integers, decided by the developer
 # app_version represents tasks and fixed bugs, which is different from the build version that is specific to each client
-app_version: 1.13.1
+app_version: 1.13.1+1
 
 environment:
   sdk: ^3.8.0