message: Improve layout of contribution section
diff: @@ -17,7 +17,8 @@ The minimum requirements for code contributions are:
  3. New and changed challenges should have a corresponding e2e test
  4. All unit, integration and e2e tests must pass locally
  -**To avoid [falling into the _Content Duplication_ trap](http://bkimminich.github.io/juice-shop/kuehne-nagel_techup.html#/33)
  -you find our detailed contribution guidelines over here:**
  +### Contribution Guidelines
  +
  +You can find our detailed contribution guidelines over here:
  https://bkimminich.gitbooks.io/pwning-owasp-juice-shop/content/part3/contribution.html
  