Use absolute URL for README logo to fix PyPI rendering

PyPI cannot resolve relative image paths. Use raw.githubusercontent.com
URL so the logo displays on both GitHub and PyPI.

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

Author: laughingman7743

README.md

@@ -2,7 +2,7 @@
 
 <div align="center">
 
-<img src="docs/_static/icon.png" alt="PyAthena logo" width="250">
+<img src="https://raw.githubusercontent.com/laughingman7743/PyAthena/master/docs/_static/icon.png" alt="PyAthena logo" width="250">
 
 [![PyPI - Version](https://badge.fury.io/py/pyathena.svg)](https://badge.fury.io/py/pyathena)
 [![PyPI - Python Version](https://img.shields.io/pypi/pyversions/PyAthena.svg)](https://pypi.org/project/PyAthena/)