fix: Access rules of oathkeeper for quick start

[sawadashota]

Related issue

close #389

Proposed changes

Fix access rules of oathkeeper for quick start to access / as dashboard same as standalone quick start.

Checklist

• I have read the contributing 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.

[aeneasr]

Thank you!