doc: simplify Homebrew installation instructions #4173

Job	Run time
Prepare version string	5s
Build / Build Linux	3m 13s
Build / Build macOS (Apple Silicon)	2m 6s
Build / Build Linux (arm64)	3m 10s
Build / Build Windows ARM64	3m 6s
Build / Build macOS (Intel)	3m 16s
Build / Build Windows x64	3m 15s
Package / Package Linux (linux-arm64)	59s
Package / Package macOS (osx-x64)	19s
Package / Package macOS (osx-arm64)	23s
Package / Package Windows (win-x64)	29s
Package / Package Linux (linux-x64)	1m 2s
Package / Package Windows (win-arm64)	22s
	21m 45s

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