fix wiki image styling

- If you are on Windows, keep in mind you may run into the following problem. By default, the filesystem in Windows enforces a 260 character limit on paths. The longest path length for a file in this project, if the drive name is included, is 263 characters. A possible solution is to pass a single character name for the project folder in the git clone command, and clone the project on drive root, which may bring the longest file path down to compatible length. Alternatively, Windows 10 and 11 offer settings to enable a much much longer maximum file path that requires additional configuration. You may check that out at your own will.

- To gain write access you have to become member of the [sailing-analytics-team](https://github.com/orgs/SAP/teams/sailing-analytics-team) organization. For that you need to [link your Github user to the Github SAP organization](https://wiki.one.int.sap/wiki/display/ospodocs/Self-Service+for+Joining+an+SAP+GitHub+Organization). For that to work, your Github account needs to have your @sap.com e-mail address assigned and verified. We still have a shadow repository around that, e.g., powers our Wiki at [https://wiki.sapsailing.com](https://wiki.sapsailing.com) and which lives at ``ssh://trac@sapsailing.com/home/trac/git``.

- Announcements relevant for developers are posted on [GitHub](https://github.com/SAP/sailing-analytics) in the Discussions tab. In order to get notifications you can subscribe to discussions by clicking on "Watch" in the Repository, then "Custom". In the new Popup select "Discussions" and confirm by clicking "Apply".

- In case you'd like to get access to the external git at `ssh://trac@sapsailing.com/home/trac/git` please send your SSH public key to one of the project maintainers, requesting git access. Make sure to NOT generate the key using Putty. Putty keys don't work reliably under Linux and on Windows/Cygwin environments. Use ssh-keygen in a Cygwin or Linux or MacOS/X environment instead. For further instructions for generating an ssh-key see [GitHub](https://docs.github.com/en/authentication/connecting-to-github-with-ssh/generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent).

Note: If you want to use the ssh-key in the context of our solution, it can be an RSA or ED25519 format. Example for creating a key: `ssh-keygen -t ed25519 -b 512 -C "test@test.com"`. Make sure to set a non-empty password for your key.