Fix yamllint comment spacing warnings

.gitlab-ci.yml

.gitlab/ci/database.gitlab-ci.yml

.gitlab/ci/dev-fixtures.gitlab-ci.yml

.gitlab/ci/global.gitlab-ci.yml

.gitlab/ci/qa.gitlab-ci.yml

.gitlab/ci/rails/shared.gitlab-ci.yml

.gitlab/ci/rules.gitlab-ci.yml

.gitlab/ci/test-on-cng/main.gitlab-ci.yml

data/deprecations/14-8-graphql-runner-active.yml

...ecations/15-9-deprecate-take-schedule-ownership-field.yml

data/deprecations/15-9-secure-analyzers-bump.yml

...ations/16-11-GITLAB_SHARED_RUNNERS_REGISTRATION_TOKEN.yml

data/deprecations/16-9-secure-analyzers-bump.yml

data/deprecations/17-0-workflow-templates.yml

data/deprecations/17-4-graphql-add-on-purchase.yml

data/deprecations/17-4-graphql-namespace-add-on-purchase.yml

...eprecations/17-5-deprecate-merge-train-graphql-fields.yml

data/deprecations/17-6-deprecate-pipeline-subscriptions.yml

data/deprecations/17-7-deprecated-openssl-1.yml

data/deprecations/18-0-graphql-removal.yml