do collaboration in feature branches

basics.html

@@ -937,7 +937,7 @@
             - we: new commit
             - group: fetch, lol, pull upstream master, lol
             - group: push origin, lol
-            - group: commit, push, MR (master or wip?)
+            - group: branch, switch, commit, push, MR
             - collaboration happens in issues and MR discussion!
             - we: review and possible resolve merge request in GL
             - show next slide once merging is done on command line