chore: Fix a format of the package installtion in README.md for regex

Author: tsgcpp

README.md

@@ -7,7 +7,7 @@ Extension package for Unity Localization
 - Window -> Package Manager
 - Add package from git URL...
 - Add the package URL
-  - `https://github.com/tsgcpp/UnityLocalizationExtension.git?path=Assets/Plugins/LocalizationExtension#<tag>`
+  - e.g. `https://github.com/tsgcpp/UnityLocalizationExtension.git?path=Assets/Plugins/LocalizationExtension#0.1.0` #version
 
 
 ## Feature