Bump toolchains/riscv-tools/riscv-isa-sim from 7812eab to 9b44f4b#31

dependabot[bot] wants to merge 1 commit intomainucb-eecs151tapeout/ofot-chipyard:mainfrom

dependabot/submodules/toolchains/riscv-tools/riscv-isa-sim-9b44f4bucb-eecs151tapeout/ofot-chipyard:dependabot/submodules/toolchains/riscv-tools/riscv-isa-sim-9b44f4bCopy head branch name to clipboard