Update permission options in README; minor tweaks #1332

Job	Run time
Container Build (ubuntu-latest, loongarch64-unknown-linux-gnu, loong64)	15m 37s
Code Coverage (ubuntu-latest)	3m 26s
Build (ubuntu-latest, arm-unknown-linux-gnueabihf, use-cross)	3m 48s
MinSRV	1m 18s
Build (ubuntu-latest, aarch64-unknown-linux-gnu, use-cross)	4m 32s
Build (ubuntu-latest, aarch64-unknown-linux-musl, use-cross)	3m 47s
Build (ubuntu-latest, i686-unknown-linux-gnu, use-cross)	4m 0s
Style (ubuntu-latest)	50s
Build (ubuntu-latest, i686-unknown-linux-musl, use-cross)	3m 49s
Style (macos-latest)	1m 13s
Build (ubuntu-latest, x86_64-unknown-linux-gnu, use-cross)	3m 27s
Style (windows-latest)	2m 3s
Build (ubuntu-latest, x86_64-unknown-linux-musl, use-cross)	5m 30s
Build (macos-latest, x86_64-apple-darwin)	3m 5s
Build (macos-latest, aarch64-apple-darwin)	2m 22s
Build (windows-latest, i686-pc-windows-gnu)	4m 53s
Build (windows-latest, i686-pc-windows-msvc)	5m 29s
Build (windows-latest, x86_64-pc-windows-gnu)	7m 33s
Build (windows-latest, x86_64-pc-windows-msvc)	4m 44s
	1h 21m 26s

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