Update gbr-london.yaml (#2374)

Amending meetup organisers

Author: pzaichkina

docs/_data/meetups/gbr-london.yaml

@@ -4,15 +4,7 @@ city: London
 website: https://www.meetup.com/write-the-docs-london/events/
 meetup: Write-The-Docs-London
 organizers:
-  - name: Kristof Van Tomme
-    link: http://twitter.com/kvantomme/
-  - name: Jennifer Lambourne
-    link: https://twitter.com/Jenny__Anne
-  - name: Daniel D. Beck
-    link: https://twitter.com/ddbeck
-  - name: Sharif Salah
-    link: https://twitter.com/sharif_salah
-  - name: James Scott
-    link: https://twitter.com/scottydocs
-  - name: Benjamin Miller
-    link: https://www.meetup.com/Write-The-Docs-London/
+  - name: Polina Zaichkina
+    link: https://www.linkedin.com/in/polina-zaichkina/
+  - name: Elisa Escapa Otani
+    link: https://www.linkedin.com/in/eescapa/