Dockerfile: switch CRIU install to Debian 11 "bullseye" packages

There's a package repository for Debian 11 "bullseye" now.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Dockerfile

@@ -20,10 +20,10 @@ ENV GO111MODULE=off
 
 FROM base AS criu
 ARG DEBIAN_FRONTEND
-ADD --chmod=0644 https://download.opensuse.org/repositories/devel:/tools:/criu/Debian_10/Release.key /etc/apt/trusted.gpg.d/criu.gpg.asc
+ADD --chmod=0644 https://download.opensuse.org/repositories/devel:/tools:/criu/Debian_11/Release.key /etc/apt/trusted.gpg.d/criu.gpg.asc
 RUN --mount=type=cache,sharing=locked,id=moby-criu-aptlib,target=/var/lib/apt \
     --mount=type=cache,sharing=locked,id=moby-criu-aptcache,target=/var/cache/apt \
-        echo 'deb https://download.opensuse.org/repositories/devel:/tools:/criu/Debian_10/ /' > /etc/apt/sources.list.d/criu.list \
+        echo 'deb https://download.opensuse.org/repositories/devel:/tools:/criu/Debian_11/ /' > /etc/apt/sources.list.d/criu.list \
         && apt-get update \
         && apt-get install -y --no-install-recommends criu \
         && install -D /usr/sbin/criu /build/criu