Support pages with more than one table

For pages set to have table display behaviour overriden (https://docs.gitlab.com/ee/development/documentation/styleguide.html#tables-overlapping-the-toc), more than just the first table will have the style applied.

• Before: https://docs.gitlab.com/runner/configuration/advanced-configuration.html#the-runnerscache-section
• After: http://fix-for-table-display-block-workaround.178.62.207.141.xip.io/runner/configuration/advanced-configuration.html#the-runnerscache-section