Bump react-sdk version

Change-Id: Ib9c09904372447813e22a87cbb76db2442061d30

Author: awesome-michael

Dockerfile

@@ -5,7 +5,7 @@ FROM node:10 as builder
 # images of riot-web develop.
 ARG USE_CUSTOM_SDKS=true
 ARG REACT_SDK_REPO="https://github.com/awesome-technologies/matrix-react-sdk.git"
-ARG REACT_SDK_BRANCH="2020.09.0-amp.chat"
+ARG REACT_SDK_BRANCH="2020.09.1-amp.chat"
 
 RUN apt-get update && apt-get install -y git dos2unix