Mention `WasmDatabase.probe()` in changelog #1815

Job	Run time
setup / Compile sqlite3 for tests (ubuntu-latest)	17s
setup / Compile sqlite3 for tests (macos-latest)	3m 40s
setup / Compile sqlite3 for tests (windows-latest)	20s
setup / Get and cache Dart dependencies	42s
drift_dev	7m 53s
drift package	3m 45s
sqlparser	1m 4s
Documentation	5m 19s
Integration tests for migration tooling	1m 50s
Integration tests	4m 25s
	29m 15s

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