Update README.md: Add x-cmd method to install bat #3810

Job	Run time
Extract crate metadata	3s
Documentation	44s
Ensure 'cargo fmt' has been run	5s
License checks	1m 9s
Run tests with updated syntaxes and themes	4m 55s
Run tests with system wide configuration	2m 33s
cargo audit	10s
Minimum supported rust version	1m 27s
aarch64-unknown-linux-musl (ubuntu-20.04)	3m 50s
aarch64-unknown-linux-gnu (ubuntu-20.04)	4m 9s
arm-unknown-linux-gnueabihf (ubuntu-20.04)	3m 59s
arm-unknown-linux-musleabihf (ubuntu-20.04)	4m 10s
i686-pc-windows-msvc (windows-2019)	7m 1s
i686-unknown-linux-gnu (ubuntu-20.04)	3m 37s
i686-unknown-linux-musl (ubuntu-20.04)	4m 6s
x86_64-apple-darwin (macos-12)	5m 30s
aarch64-apple-darwin (macos-14)	3m 0s
x86_64-pc-windows-gnu (windows-2019)	7m 44s
x86_64-pc-windows-msvc (windows-2019)	6m 50s
x86_64-unknown-linux-gnu (ubuntu-20.04)	3m 37s
x86_64-unknown-linux-musl (ubuntu-20.04)	3m 40s
all-jobs	1s
Publish to Winget	0s
	1h 12m 20s

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