Bump version to 0.2.4

v0.2.3 could not be published: its tag predates the publish-workflow fix,
so the release ran the pinned action that rejects Metadata-Version 2.5.
Nothing was uploaded to PyPI under 0.2.3.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: Juan Pablo Manson

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "codeforms"
-version = "0.2.3"
+version = "0.2.4"
 description = "Python library for creating, validating, and rendering web forms using Pydantic"
 readme = "README.md"
 requires-python = ">=3.9"