Increase Orbax version.

PiperOrigin-RevId: 463127579

Author: cpgaffney1

setup.py

@@ -22,7 +22,7 @@
 
 setuptools.setup(
     name='orbax',
-    version='0.0.3',
+    version='0.0.4',
     description='Orbax',
     long_description=_LONG_DESCRIPTION,
     long_description_content_type='text/markdown',