add `riscv-semihosting` #345

	on:
	push:
	branches: [ master ]
	pull_request:
	merge_group:

	name: Code formatting check

	jobs:
	rustfmt:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: dtolnay/rust-toolchain@stable
	with:
	components: rustfmt
	- name: Run Rustfmt
	run: cargo fmt --all -- --check --verbose

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