Add Ghanshyam nomination as chair

I would like to nominate myself as chair of the
Technical Committee for Yoga cycle.

I served as TC Chair in Xena cycle and trying my best to be more
active in TC and leading the things in various form, for example,
community-wide goal, TC discussion or any reach out to project teams.

I would like to continue the chair role and try to improve the
TC interaction with rest of the community, engage TC in doing
more technical things, and help OpenStack community to achieve the
common goals.

Thanks for considering my nomination.

Change-Id: I80cfb7b9c2d7345646ae6f15c33daff214d01fca

reference/members.yaml

@@ -3,7 +3,7 @@
   email: gmann@ghanshyammann.com
   memberid: 6461
   date: September 2021
-  role: null
+  role: chair
 
 - name: Jay Bryant
   irc: jungleboyj