Add changelog entry for v4.48.2 #1326

Job	Run time
Run linters (pylint)	1m 46s
Run linters (flake8)	1m 42s
Run linters (pydocstyle)	1m 29s
Run linters (mypy)	1m 42s
Run tests with different pydantic versions	3m 12s
Run tests (3.9)	1m 57s
Run tests (3.10)	1m 58s
Run tests (3.8)	1m 57s
Run tests (3.12)	2m 0s
Run tests with coverage	3m 1s
Run tests (3.13)	1m 53s
Run tests (3.11)	2m 1s
	24m 38s

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