Improve the translation of docs/index

Author: greyli

README.md

@@ -91,7 +91,7 @@ An example of one such file, from docs/.../index.po, is given below.
 ```po
 #: ../../index.rst:4
 msgid "Welcome to Flask"
-msgstr "欢迎来到 Flask"
+msgstr "欢迎来到 Flask 的世界"
 ```
 
 Another case, msgid is multi-line text and contains reStructuredText syntax:

docs/conf.py

@@ -46,7 +46,7 @@
         ProjectLink("网站", "https://palletsprojects.com/p/flask/"),
         ProjectLink("Twitter", "https://twitter.com/PalletsTeam"),
         ProjectLink("聊天", "https://discord.gg/pallets"),
-        ProjectLink("文档翻译源码", "https://github.com/greyli/flask-docs-zh"),
+        ProjectLink("参与翻译", "https://github.com/greyli/flask-docs-zh"),
     ]
 }
 html_sidebars = {
@@ -101,7 +101,7 @@ def setup(app):
 
 # Translation ----------------------------------------------------------
 
-locale_dirs = ['locales']
+locale_dirs = ["locales"]
 gettext_compact = False
-language = 'zh_CN'
-html_search_language = 'zh'
+language = "zh_CN"
+html_search_language = "zh"

docs/locales/zh_CN/LC_MESSAGES/index.po

@@ -19,7 +19,7 @@ msgstr ""
 
 #: ../../index.rst:4
 msgid "Welcome to Flask"
-msgstr "Welcome to Flask"
+msgstr "欢迎来到 Flask 的世界"
 
 msgid "Flask: web development, one drop at a time"
 msgstr "Flask：Web 开发，一次一滴"