docs: update migration guide url

HHongSeungWoo · HHongSeungWoo · commit 00f19feb81a8 · 2024-09-20T14:44:44.000+09:00
diff --git a/docs/ja/migration-guide.md b/docs/ja/migration-guide.md
@@ -53,4 +53,4 @@ await openapiTS(input);
 
 ---
 
-[完全な変更履歴はこちら](https://github.com/openapi-ts/openapi-typescript/blob/6.x/packages/openapi-typescript/CHANGELOG.md)
+[完全な変更履歴はこちら](https://github.com/openapi-ts/openapi-typescript/blob/main/packages/openapi-typescript/CHANGELOG.md)

Original file line number	Diff line number	Diff line change
`@@ -53,4 +53,4 @@ await openapiTS(input);`
`53`	`53`
`54`	`54`	`---`
`55`	`55`
`56`		`-[完全な変更履歴はこちら](https://github.com/openapi-ts/openapi-typescript/blob/6.x/packages/openapi-typescript/CHANGELOG.md)`
	`56`	`+[完全な変更履歴はこちら](https://github.com/openapi-ts/openapi-typescript/blob/main/packages/openapi-typescript/CHANGELOG.md)`