Merge branch 'docs-aqualls-spelling-again' into 'master'

doc/.vale/gitlab/spelling-exceptions.txt

doc/development/internal_api.md

doc/development/ordering_table_columns.md

doc/development/pipelines.md

doc/development/projections.md

doc/development/pry_debugging.md

doc/development/python_guide/index.md

doc/development/reactive_caching.md

doc/development/repository_mirroring.md

doc/development/testing_guide/end_to_end/best_practices.md

doc/development/testing_guide/end_to_end/page_objects.md

...de/end_to_end/running_tests_that_require_special_setup.md

doc/development/usage_ping/metrics_dictionary.md

doc/development/utilities.md

doc/gitlab-basics/command-line-commands.md

doc/gitlab-basics/start-using-git.md

doc/install/aws/index.md

doc/install/google_cloud_platform/index.md

doc/integration/cas.md

doc/integration/gmail_action_buttons_for_gitlab.md