Remove a duplicated sentence from define-a-timer-start-event #17

	name: Markdown linter

	# What the execution context is:
	# The creation of a pull request. Can also be triggered manually.

	# What it does:
	# Performs Markdown linting on the content of the pull request.

	# Why we need it:
	# To maintain a level of consistency in the markup content.

	# What's important to know:
	# As well as the rules defined in the configuration, a custom
	# rule is also employed to check title case.

	on:
	workflow_dispatch:
	pull_request:
	branches: [main]
	paths: 'docs/**'

	jobs:
	main:
	if: contains(github.repositoryUrl, 'github.com')
	runs-on: ubuntu-20.04
	steps:

	- id: checkout_repo
	name: Check out the repository content
	uses: actions/checkout@v3

	- id: check_files_changed
	uses: dorny/paths-filter@v2
	with:
	list-files: 'escape'
	filters: \|
	changed:
	- 'docs/**'

	- id: add_matcher
	name: Add the matcher for markdownlint style message output
	run: "echo ::add-matcher::.github/workflows/markdownlint/problem-matcher.json"

	- id: install_linter
	name: Install linting tool, custom rule and rule helpers
	run: \|
	npm install \
	--no-package-lock \
	--no-save \
	markdownlint-cli@0.27 markdownlint-rule-titlecase markdownlint-rule-helpers@0.18

	- id: run_linter
	if: steps.check_files_changed.outputs.changed_files
	name: Run linter with specific rules, on the docs/ content
	run: \|
	npx markdownlint \
	--config .github/workflows/markdownlint/config.yaml \
	--rules .github/workflows/markdownlint/md901 \
	--rules markdownlint-rule-titlecase \
	${{ steps.check_files_changed.outputs.changed_files }}

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