chore: bump v0.4.8

Cargo.lock

@@ -1414,7 +1414,7 @@ dependencies = [
 
 [[package]]
 name = "rathole"
-version = "0.4.7"
+version = "0.4.8"
 dependencies = [
  "anyhow",
  "async-http-proxy",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "rathole"
-version = "0.4.7"
+version = "0.4.8"
 edition = "2021"
 authors = ["Yujia Qiao <code@rapiz.me>"]
 description = "A reverse proxy for NAT traversal"