Update README.md

[Chefski]

Added colons and full stops where they were missing. Also wording in the 'Develop' section to reduce repetitiveness.

Related issue(s)

README.md missing colons and fullstops.

Checklist

• I have read the contributing guidelines.
• I have referenced an issue containing the design document if my change
  introduces a new feature.
• I am following the
  contributing code guidelines.
• I have read the security policy.
• I confirm that this pull request does not address a security
  vulnerability. If this pull request addresses a security. vulnerability, I
  confirm that I got green light (please contact
  security@ory.sh) from the maintainers to push
  the changes.
• I have added tests that prove my fix is effective or that my feature
  works.
• I have added or changed the documentation.

[CLAassistant]

All committers have signed the CLA.

[Chefski]

Probably could've just made this an issue thread instead of a pull request

[vinckr]

Thanks 😁