reorder sections for readability
reorder sections for readability

Scanning the page, it looked as though "One-line summaries on GitHub repositories" came _under_ "Things we shouldn't put in the README". Took a few seconds to figure out that GovUK guidelines _encourage_ writing the one-line summaries, rather than discourage it!

Reordering the sections would remove those few seconds of doubt.
alphagov/govuk-developer-docs,alphagov/govuk-developer-docs,alphagov/govuk-developer-docs,alphagov/govuk-developer-docs