Fix #111 sm4ed/ks mentions rt instead of rs1

 On branch dev/next-release
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 Changes to be committed:
	modified:   insns/sm4ed.adoc
	modified:   insns/sm4ks.adoc

 Changes not staged for commit:
	modified:   ../../extern/riscv-gnu-toolchain (modified content)
	modified:   ../../extern/sail-riscv (untracked content)