docs: align App Engine Node runtime OS

yanxu · yanxu · commit 3fb0aa2679d6 · 2026-05-12T21:33:34.000+08:00
diff --git a/app.yaml b/app.yaml
@@ -2,7 +2,7 @@ runtime: nodejs
 env: flex
 
 runtime_config:
-  operating_system: "ubuntu24"
+  operating_system: "ubuntu22"
   runtime_version: "22"
 
 env_variables:
