Fix typo in Rx doc.md #13

	name: Build firmware
	# Don't enable CI on push, just on PR. If you
	# are working on the main repo and want to trigger
	# a CI build submit a draft PR.
	on:
	pull_request:
	paths-ignore:
	- 'src/**'
	- '.github/**'
	- 'cmake/**'
	- 'lib/**'
	- 'docs/Settings.md'
	- 'CMakeLists.txt'
	- '*.sh'

	jobs:
	test:
	#needs: [build]
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Install dependencies
	run: sudo apt-get update && sudo apt-get -y install ninja-build
	- name: Run Tests
	run: mkdir -p build && cd build && cmake -DTOOLCHAIN=none -G Ninja .. && ninja check

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