While footnotes are numbered when rendered, it is best to avoid using
numbers in the Markdown file itself as the numbers are less descriptive,
and make it difficult to refactor (or even repeat the use of a footer).

Signed-off-by: JP-Ellis <josh@jpellis.me>

Signed-off-by: JP-Ellis <josh@jpellis.me>

Signed-off-by: JP-Ellis <josh@jpellis.me>

The frequency of updating the docs was previously reduced to avoid noise
in the Pact Python Slack channel; however, it means that blog posts, or
minor corrections to any docstring do not get updated.

I am reverting the previous change and will investigate the possibility
of publishing updates to Slack, instead of Slack subscribing to all
deployments.

Signed-off-by: JP-Ellis <josh@jpellis.me>