Update the developer alumni page to reflect that the following src
commit bits have been taken in:

bschmidt Bernhard Schmidt
dmarion Damjan Marion
ghelmer Guy Helmer
jfv Jack Vogel
jh Jaakko Heinonen
rmh Robert Millan
versus Konrad Jankowski

Src commit bits were also take in for:

kensmith Ken Smith
trociny Mikolaj Golub

but Ken Smith still has a docs commit bit, and Mikolaj Golub still has
a ports commit bit.

Approved by: bcr
Differential Revision: https://reviews.freebsd.org/D9274