fix(pkg-py): Bump required chatlas to v0.12.0

Author: gadenbuie

pyproject.toml

@@ -5,8 +5,9 @@ readme = "pkg-py/README.md"
 requires-python = ">=3.9"
 license = { text = "MIT" }
 dependencies = [
+    "chatlas>=0.12.0",
     "htmltools>=0.6.0",
-    "shiny>=1.4.0"
+    "shiny>=1.4.0",
 ]
 dynamic = ["version"]
 authors = [