fix: improve readme #155

Job	Run time
prepare	5s
build / Generate matrix	22s
build / DuckDB-Wasm (wasm_mvp, wasm32-emscripten)	2m 11s
build / Linux (linux_amd64, ubuntu:18.04, x64-linux)	14m 47s
build / DuckDB-Wasm (wasm_eh, wasm32-emscripten)	1m 54s
build / Linux (linux_amd64_gcc4, quay.io/pypa/manylinux2014_x86_64, x64-linux)	14m 39s
build / Windows (windows_amd64, x64-windows-static-md)	7m 2s
build / DuckDB-Wasm (wasm_threads, wasm32-emscripten)	1m 46s
build / MacOS (osx_amd64, x86_64, x64-osx)	1m 48s
build / Linux (linux_arm64, ubuntu:18.04, arm64-linux)	15m 8s
build / Windows (windows_amd64_rtools, x64-mingw-static)	6m 46s
build / MacOS (osx_arm64, arm64, arm64-osx)	1m 52s
doc_test	0s
deploy	0s
docs_all	0s
	1h 8m 20s

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