Dockerfile: use Debian_11 repo for criu
Dockerfile: use Debian_11 repo for criu

The Debian_11 was not available in this repo at the time when commit 24d318b8b
was made, so we had to use Debian_10 URL for Debian 11 (apparently without any
consequences).

Now Debian_11 is available, so let's switch to it.

Signed-off-by: Kir Kolyshkin <3a017b8ddb3f9cf3e4a59978b004111bdeb97f08@gmail.com>

kolyshkin/runc,opencontainers/runc,rhatdan/runc,kolyshkin/runc,opencontainers/runc,opencontainers/runc,opencontainers/runc,rhatdan/runc,kolyshkin/runc,rhatdan/runc,rhatdan/runc,kolyshkin/runc