Update Dockerfile.3.10-ubuntu22.04

Author: hephaex

python/Dockerfile.3.10-ubuntu22.04

@@ -66,7 +66,7 @@ LABEL ai.backend.kernelspec="1" \
       ai.backend.features="batch query uid-match user-input" \
       ai.backend.resource.min.cpu="1" \
       ai.backend.resource.min.mem="256m" \
-      ai.backend.base-distro="ubuntu20.04" \
+      ai.backend.base-distro="ubuntu22.04" \
       ai.backend.runtime-type="python" \
       ai.backend.runtime-path="/usr/bin/python3" \
       ai.backend.service-ports="ipython:pty:3000,jupyter:http:8070,jupyterlab:http:8090"