Add Verena's name and date

docs/gitlab/3-3-collaborating-play-with-this-page.md

@@ -47,7 +47,7 @@ We, the undersigned, have submitted a pull request to this repository:
 > 2) When you are adding your name, pronouns and date, delete the "<br>" next to the number you are updating. This is an html line break, so the list is vertical even when there are no entries. Without these "<br>" after each number, markdown tries to be be clever and put them all in one line for you. Sometimes useful, but not right now.
 
 1. <br>
-2. <br>
+2. Verena Sarrazin, 10/11/2021
 3. <br>
 4. <br>
 5. <br>