Update new contribution agreement from Ghais Issa, Árni Dagur, Tushar…

… Das

 patch by Mick Semb Wever; reviewed by Martin Sucha for CASSANDRA-19723

NOTICE

@@ -48,7 +48,7 @@ Matt Robenolt <[email protected]>
 Phillip Couto <[email protected]> *
 Niklas Korz <[email protected]>
 Nimi Wariboko Jr <[email protected]>
-Ghais Issa <[email protected]>
+Ghais Issa <[email protected]> *
 Sasha Klizhentas <[email protected]>
 Konstantin Cherkasov <[email protected]>
 Ben Hood <[email protected]>
@@ -160,8 +160,8 @@ Dmitriy Kozlov <[email protected]> *
 Alexey Romanovsky <[email protected]>
 Jaume Marhuenda Beltran <[email protected]>
 Piotr Dulikowski <[email protected]>
-Árni Dagur <[email protected]>
-Tushar Das <[email protected]>
+Árni Dagur <[email protected]> *
+Tushar Das <[email protected]> *
 Maxim Vladimirskiy <[email protected]> *
 Bogdan-Ciprian Rusu <[email protected]>
 Yuto Doi <[email protected]> *