update en-coc effective date

2023->2024/02/20

src/templates/pycontw-2024/contents/en/about/code-of-conduct.html

@@ -84,7 +84,7 @@ <h2>License (CC BY-SA 3.0 TW)</h2>
 <p>This document is licensed under an Attribution-ShareAlike 3.0 Taiwan license.</p>
 <img src="https://i.imgur.com/cVjN760.jpg =200x"></img>
 
-<p>The Code of Conduct of PyCon TW 2023 is effective from Mar 1st, 2023. PyCon Taiwan reserve the right to modify this announcement at any time and will announce any updates when available.</p>
+<p>The Code of Conduct of PyCon TW 2024 is effective from Feb 20th, 2024. PyCon Taiwan reserve the right to modify this announcement at any time and will announce any updates when available.</p>
 <p>Thank you.</p>
 
 {% endblock content %}