PYTHON-5593 Adds v4.15.2 notes to changelog #8325

Job	Run time
CPython pypy-3.10-ubuntu-latest	12m 16s
CPython 3.13t-ubuntu-latest	11m 31s
CPython 3.10-ubuntu-latest	11m 19s
static	4m 9s
Docs Checks	44s
Link Check	2m 39s
Make an sdist	12s
Typing Tests (3.11)	53s
Integration Tests	1m 11s
Typing Tests (3.10)	52s
DocTest	1m 4s
Test minimum dependencies and Python	39s
Install from SDist and Test	48s
	48m 17s

Provide feedback