General: Add new contributors to about us page

[MaximilianAnzinger]

Checklist

General

• This is a small issue that I tested locally and was confirmed by another developer on a test server.
• I chose a title conforming to the naming conventions for pull requests.

Motivation and Context

Adds new contributors to the about us page.

How to add yourself

1. Checkout the chore/about-us branch locally
2. Add yourself to this file: src/main/resources/public/content/about-us.json

• Use fullName for your name
• Use sortBy if the automatic sorting does not detect your last name correctly (if your name consists of mulitple words)

3. Add your image to the public/images/about directory and link that image using the photoDirectory key. Make sure to use a square, otherwise crop your image before uploading it.
4. Make sure the file has at most 100KB

Steps for Testing

View the about us page and check that the new contributors are visible and sorted.

[vinceclifford]

Works as expected

[rstief]

Tested on ts3 all new additions are there and page looks good.

[krusche]

some images are too large, please provide smaller versions

[JohannesStoehr]

Updated links work and changes overall look good!

[vinceclifford]

LGTM, tested on TS3

[Predixx]

Tested on ts3 with Vincent Clifford. Images all look great and are displayed correctly