removed 'site'

packages/app/resource/locales/en_US/notifications/notActiveUser.txt

@@ -10,4 +10,4 @@ If you did not request a password reset, you can safely ignore this email.
 -------------------------------------------------------------------------
 
 GROWI: {{ appTitle }}
-Site URL: {{ url }}
+URL: {{ url }}

packages/app/resource/locales/ja_JP/notifications/notActiveUser.txt

@@ -10,4 +10,4 @@
 -------------------------------------------------------------------------
 
 GROWI: {{ appTitle }}
-サイト URL: {{ url }}
+URL: {{ url }}

packages/app/resource/locales/zh_CN/notifications/notActiveUser.txt

@@ -10,4 +10,4 @@
 -------------------------------------------------------------------------
 
 GROWI: {{ appTitle }}
-网站网址: {{ url }}
+URL: {{ url }}