chore: bump version to 1.3.1, fix publish workflow trigger

- Bump version from 1.3.0 to 1.3.1
- Change publish workflow trigger from `created` to `published` so it
  fires when a draft release is published (not just on direct creation)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: yeldarby

.github/workflows/publish.yml

@@ -2,7 +2,7 @@ name: Publish WorkFlow
 
 on:
   release:
-    types: [created]
+    types: [published]
 
 jobs:
   build:

roboflow/__init__.py

@@ -15,7 +15,7 @@
 from roboflow.models import CLIPModel, GazeModel  # noqa: F401
 from roboflow.util.general import write_line
 
-__version__ = "1.3.0"
+__version__ = "1.3.1"
 
 
 def check_key(api_key, model, notebook, num_retries=0):