Simplify install instructions #17

Job	Run time
Build extension binaries / Generate matrix	24s
Build extension binaries / MacOS (osx_amd64, x86_64, x64-osx)	2m 29s
Build extension binaries / MacOS (osx_arm64, arm64, arm64-osx)	2m 38s
Build extension binaries / DuckDB-Wasm (wasm_mvp, wasm32-emscripten)	3m 4s
Build extension binaries / Linux (linux_amd64, ubuntu:18.04, x64-linux)	41s
Build extension binaries / Windows (windows_amd64, x64-windows-static-md)	21m 43s
Build extension binaries / DuckDB-Wasm (wasm_eh, wasm32-emscripten)	2m 42s
Build extension binaries / Linux (linux_amd64_gcc4, quay.io/pypa/manylinux2014_x86_64, x64-linux)	33s
Build extension binaries / Windows (windows_amd64_rtools, x64-mingw-static)	40m 35s
Build extension binaries / DuckDB-Wasm (wasm_threads, wasm32-emscripten)	2m 37s
Build extension binaries / Linux (linux_arm64, ubuntu:18.04, arm64-linux)	40s
Deploy extension binaries	0s
	1h 18m 6s

Provide feedback