[Upstream training] Update TC member list

Since Technical Committee members need to be updated,
this commit removes the screenshot on slide 3 and inserts
two screenshots for all the current TC members on slide 4.

Change-Id: Ie1615d4ed549aa567c339ad7540de90117d6a6d3
Closes-Bug: #1490458

doc/upstream-training/source/03-technical-committee.rst

@@ -23,17 +23,24 @@ OpenStack Foundation
 The role of the Technical Committee
 ===================================
 
-.. rst-class:: colleft
-
 The Technical Committee ("TC") is tasked with providing technical leadership
 over all the OpenStack projects. It enforces OpenStack ideals (Openness,
 Transparency, Commonality, Integration, Quality), decides on issues affecting
 multiple programs, forms an ultimate appeals board for technical decisions,
 and generally has oversight over the OpenStack project entirely.
 
+- https://www.openstack.org/foundation/tech-committee/
+
+Technical Committee Members
+===========================
+
+.. rst-class:: colleft
+
+.. image:: ./_assets/03-01-TC1.png
+
 .. rst-class:: colright
 
-.. image:: ./_assets/03-01-TC.png
+.. image:: ./_assets/03-01-TC2.png
 
 OpenStack Project Teams
 =======================