build: Handle Ubuntu 22.10 moving to old releases

Author: mpe

build/ubuntu/Dockerfile

@@ -8,8 +8,8 @@ ARG apt_mirror
 ENV apt_mirror=${apt_mirror}
 RUN [ -n "$apt_mirror" ] && sed -i -e "s|ports.ubuntu.com|$apt_mirror|" /etc/apt/sources.list || true
 
-# Deal with Ubuntu 21.10 repos moving to old-releases (ppc64le only)
-RUN if echo "$from" | grep -q ".*ubuntu:21.10"; then sed -i -e "s|ports.ubuntu.com/ubuntu-ports|old-releases.ubuntu.com/ubuntu|" /etc/apt/sources.list; fi
+# Deal with Ubuntu 21/22.10 repos moving to old-releases (ppc64le only)
+RUN if echo "$from" | grep -q ".*ubuntu:2[12]\.10"; then sed -i -e "s|ports.ubuntu.com/ubuntu-ports|old-releases.ubuntu.com/ubuntu|" /etc/apt/sources.list; fi
 
 RUN apt-get -q -y update && \
     DEBIAN_FRONTEND=noninteractive \