docker: debian_testing: Allow releaseinfo change.

This should prevent errors like:

E: Repository 'http://deb.debian.org/debian testing InRelease' changed
its 'Codename' value from 'bullseye' to 'bookworm'

Change-Id: If3834c2a81bc084d79b706eb8714b04189698a90

docker/Dockerfile_debian_testing

@@ -3,7 +3,7 @@ FROM debian:testing
 ENV DEBIAN_FRONTEND=noninteractive
 
 RUN apt-get clean
-RUN apt-get update && \
+RUN apt-get update --allow-releaseinfo-change && \
     apt-get install -y -o Acquire::Retries=10 \
         devscripts \
         equivs \