add missing dots after answer letters in data science chapter review #1403

	name: Rubocop

	on:
	pull_request:
	push:
	branches:
	- main

	jobs:
	lint:
	timeout-minutes: 10
	runs-on: ubuntu-22.04

	steps:
	- uses: actions/checkout@v2
	with:
	fetch-depth: 0
	- uses: actions/cache@v2
	with:
	path: vendor/bundle
	key: ${{ runner.os }}-gems-${{ hashFiles('**/Gemfile.lock') }}
	restore-keys: \|
	${{ runner.os }}-gems-
	- name: Build docker image and run rubocop within it
	# See https://docs.codecov.io/docs/testing-with-docker
	run: \|
	./docker/build --ci
	./docker/rubocop ${{ github.event.pull_request.base.sha }} ${{ github.sha }}

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