Update trademark committee membership (#828)

Author: jasongrout

about.html

@@ -472,20 +472,12 @@
     subproject: Jupyter Frontends
 
 trademark_subcomittee:
-  - name: Brian Granger
-    photo: BrianGranger.jpeg
-    affiliation: Amazon Web Services
-    gh_handle: ellisonbg
   - name: Jason Grout
     photo: JasonGrout.jpeg
     affiliation: Independent
     gh_handle: jasongrout
     linkedin: https://www.linkedin.com/in/jason-grout/
     personal: https://jasongrout.org/
-  - name: Tim George
-    photo: TimGeorge.jpeg
-    affiliation: Cal Poly
-    gh_handle: tgeorgeux
   - name: Paul Ivanov
     photo: PaulIvanov.jpeg
     affiliation: Stoic Hedgehog
@@ -531,7 +523,7 @@
   affiliation: Anaconda
   gh_handle: RRosio
 - name: April Johnson 
-  photo: April_Johnson.jpeg
+  photo: April_Johnson.jpg
   affiliation: 2i2c
   gh_handle: aprilmj
   linkedin: https://www.linkedin.com/in/apriljohnson