Fix document error about 'make trans-copy' (#29710)

Change document to 'make docs'

---------

Co-authored-by: techknowlogick <[email protected]>

Author: dlintw

Makefile

@@ -839,10 +839,6 @@ release-sources: | $(DIST_DIRS)
 release-docs: | $(DIST_DIRS) docs
 	tar -czf $(DIST)/release/gitea-docs-$(VERSION).tar.gz -C ./docs .
 
-.PHONY: docs
-docs:
-	cd docs; bash scripts/trans-copy.sh;
-
 .PHONY: deps
 deps: deps-frontend deps-backend deps-tools deps-py
 

docs/content/development/hacking-on-gitea.en-us.md

@@ -333,14 +333,9 @@ Documentation for the website is found in `docs/`. If you change this you
 can test your changes to ensure that they pass continuous integration using:
 
 ```bash
-# from the docs directory within Gitea
-make trans-copy clean build
+make lint-md
 ```
 
-You will require a copy of [Hugo](https://gohugo.io/) to run this task. Please
-note: this may generate a number of untracked Git objects, which will need to
-be cleaned up.
-
 ## Visual Studio Code
 
 A `launch.json` and `tasks.json` are provided within `contrib/ide/vscode` for

docs/content/development/hacking-on-gitea.zh-cn.md

@@ -307,13 +307,9 @@ TAGS="bindata sqlite sqlite_unlock_notify" make build test-sqlite
 该网站的文档位于 `docs/` 中。如果你改变了文档内容，你可以使用以下测试方法进行持续集成：
 
 ```bash
-# 来自 Gitea 中的 docs 目录
-make trans-copy clean build
+make lint-md
 ```
 
-运行此任务依赖于 [Hugo](https://gohugo.io/)。请注意：这可能会生成一些未跟踪的 Git 对象，
-需要被清理干净。
-
 ## Visual Studio Code
 
 `contrib/ide/vscode` 中为 Visual Studio Code 提供了 `launch.json` 和 `tasks.json`。查看