bump ubuntu to 22

yihau · yihau · commit 4ed5155c83bb · 2024-08-14T16:23:21.000+08:00
diff --git a/ci/docker/Dockerfile b/ci/docker/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:20.04
+FROM ubuntu:22.04
 
 ARG \
   RUST_VERSION= \
