placeholder change of email:by Arush (#1719)

iogt_users/templates/wagtailusers/users/index.html

@@ -67,7 +67,7 @@ <h2>Invite Admin User</h2>
 
                 </div>
                 <div class="input-field">
-                    <input type="text" id="email" name="email" placeholder="Enter Email" title="Please enter a valid email address">
+                    <input type="text" id="email" name="email" placeholder="Email Address" title="Please enter a valid email address">
                     <span class="error-message" id="email_error" style="color: red; display: none;"></span>
                 </div>