proto: Bump to v0.3.0 (#44866)

Release Notes:

- N/A

Cargo.lock

@@ -20826,7 +20826,7 @@ dependencies = [
 
 [[package]]
 name = "zed_proto"
-version = "0.2.3"
+version = "0.3.0"
 dependencies = [
  "zed_extension_api 0.7.0",
 ]

extensions/proto/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "zed_proto"
-version = "0.2.3"
+version = "0.3.0"
 edition.workspace = true
 publish.workspace = true
 license = "Apache-2.0"

extensions/proto/extension.toml

@@ -1,7 +1,7 @@
 id = "proto"
 name = "Proto"
 description = "Protocol Buffers support."
-version = "0.2.3"
+version = "0.3.0"
 schema_version = 1
 authors = ["Zed Industries <support@zed.dev>"]
 repository = "https://github.com/zed-industries/zed"