update CHANGELOG.md for version 1.8.4 #541

Job	Run time
Python 3.9 \| Clickhouse 23.8 \| Ubuntu	2m 46s
Python 3.9 \| Clickhouse 24.1 \| Ubuntu	2m 46s
Python 3.9 \| Clickhouse 24.2 \| Ubuntu	2m 47s
Python 3.9 \| Clickhouse 24.3 \| Ubuntu	2m 45s
Python 3.9 \| Clickhouse latest \| Ubuntu	2m 45s
Python 3.10 \| Clickhouse 23.8 \| Ubuntu	2m 49s
Python 3.10 \| Clickhouse 24.1 \| Ubuntu	2m 48s
Python 3.10 \| Clickhouse 24.2 \| Ubuntu	2m 53s
Python 3.10 \| Clickhouse 24.3 \| Ubuntu	2m 48s
Python 3.10 \| Clickhouse latest \| Ubuntu	2m 48s
Python 3.11 \| Clickhouse 23.8 \| Ubuntu	2m 53s
Python 3.11 \| Clickhouse 24.1 \| Ubuntu	2m 47s
Python 3.11 \| Clickhouse 24.2 \| Ubuntu	2m 47s
Python 3.11 \| Clickhouse 24.3 \| Ubuntu	2m 47s
Python 3.11 \| Clickhouse latest \| Ubuntu	2m 46s
Python 3.12 \| Clickhouse 23.8 \| Ubuntu	2m 48s
Python 3.12 \| Clickhouse 24.1 \| Ubuntu	2m 47s
Python 3.12 \| Clickhouse 24.2 \| Ubuntu	2m 47s
Python 3.12 \| Clickhouse 24.3 \| Ubuntu	2m 48s
Python 3.12 \| Clickhouse latest \| Ubuntu	2m 46s
	55m 51s

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