README: impersonates: add `firefox_117` #1058

Job	Run time
sdist	10s
linux (ubuntu-latest, x86_64)	4m 24s
musllinux (ubuntu-latest, x86_64, x86_64-linux-musl-cross, x86_64-linux-musl-gcc, x86_64-linux-mu...	4m 19s
macos (macos-13, x86_64)	6m 44s
linux (ubuntu-latest, aarch64, crossbuild-essential-arm64, -D__ARM_ARCH=8, aarch64-linux-gnu-gcc,...	8m 46s
musllinux (ubuntu-latest, aarch64, aarch64-linux-musl-cross, crossbuild-essential-arm64, aarch64-...	5m 59s
macos (macos-14, aarch64)	2m 49s
windows (windows-latest, x64)	6m 52s
linux (ubuntu-latest, armv7, crossbuild-essential-armhf, arm-linux-gnueabihf-gcc, arm-linux-gnuea...	5m 28s
benchmark	6m 44s
Release	0s
	52m 15s

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