Add Ghanshyam nomination as chair

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

I am serving as TC since Stein cycle, which is 3rd year. I am
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. As TC chair, I would like to
continue the same and try to improve the TC interaction with
rest of the community.

Having my majority of the job time for upstream activities will help
me to fulfil all the TC chair duties[1] and to drive the new initiative
from TC or community.

Thanks for considering my nomination.

[1] https://opendev.org/openstack/governance/src/branch/master/CHAIR.rst

Change-Id: I856b360111339e25c50fbaed6b00a6c58472dc92

reference/members.yaml

@@ -3,7 +3,7 @@
   email: gmann@ghanshyammann.com
   memberid: 6461
   date: October 2020
-  role: null
+  role: chair
 
 - name: Jay Bryant
   irc: jungleboyj