Commit sig/**.rbs when code is updated by openapi generator (#491)

it's missing (found in
#484)

Author: Yang-33

.github/workflows/generate-code.yml

@@ -2,6 +2,8 @@ name: Generate OpenAPI based code
 
 on:
   push:
+    branches:
+      - master
   pull_request:
   merge_group:
   workflow_dispatch:
@@ -80,6 +82,7 @@ jobs:
 
           git add line-openapi
           git add lib/**
+          git add sig/**
           git commit -m "Codes are generated by openapi"
 
           git push origin $BRANCH_NAME

lib/line/bot/v2/webhook/model/source.rb

@@ -15,12 +15,12 @@ module Webhook
         # @see https://developers.line.biz/en/reference/messaging-api/#source-user
         class Source
           # @!attribute [rw] type
-          #   @return [String,nil] source type
+          #   @return [String] source type
           attr_accessor :type
 
-          # @param type [String,nil] source type
+          # @param type [String] source type
           def initialize(
-            type: nil,
+            type:,
             **dynamic_attributes
           )
 

line-openapi

@@ -14,10 +14,10 @@ module Line
         # the source of the event.
         # @see https://developers.line.biz/en/reference/messaging-api/#source-user
         class Source
-          attr_accessor type: String?
+          attr_accessor type: String
 
           def initialize: (
-            type: String?
+            type: String
           ) -> void
 
           def self.create: (args: Hash[Symbol, untyped]) -> Source