docs: update references to current year in templates and docs

Author: TAnas0

Diff for: NOTICE.md

@@ -1,6 +1,6 @@
 **Activity**
 </br>
-Copyright 2020 Hikaya LLC
+Copyright 2021 Hikaya LLC
 
 This product includes software developed at
 [Hikaya LLC](https://hikaya.io).

Diff for: templates/base.html

@@ -323,7 +323,7 @@
         {% if "links.html"|template_exists %} {% include "links.html" %}
         {% else %}
         <div class="column col-xs-16 text-right">
-          <a href="https://hikaya.io" class="text-muted">© 2020 Hikaya</a>
+          <a href="https://hikaya.io" class="text-muted">© 2021 Hikaya</a>
           <a href="https://docs.hikaya.io" class="text-muted">{% trans 'Documentation' %}</a>
           <a href="https://github.com/hikaya-io/activity/blob/master/LICENSE" class="text-muted">{% trans 'License' %}</a>
         </div>

Diff for: templates/emails/invite.txt

@@ -9,7 +9,7 @@ Activity is an open source product brought to you by your friends at Hikaya
 
 {{link}}
 
-Copyright © 2020 Hikaya
+Copyright © 2021 Hikaya
 All rights reserved.
 
 This email was sent to {{email}} because you created an Activity account.

Diff for: templates/emails/registration/email_confirmation.html

@@ -911,7 +911,7 @@
                                               <tbody>
                                                 <tr>
                                                   <td valign="top" class="mcnTextContent" style="padding-top:0; padding-right:18px; padding-bottom:9px; padding-left:18px;">
-                                                    <em>Copyright © 2020 Hikaya<br>
+                                                    <em>Copyright © 2021 Hikaya<br>
                                                     All rights reserved.</em><br>
                                                     <br>
                                                     This email was sent to {{user.email}} because you created an Activity account.

Diff for: templates/emails/registration/welcome.txt

@@ -9,7 +9,7 @@ Login to activity
 
 {{domain}}/accounts/login/
 
-Copyright © 2020 Hikaya
+Copyright © 2021 Hikaya
 All rights reserved.
 
 This email was sent to {{user.email}} because you registered a new Activity account.

Diff for: templates/registration/password_reset_email.html

@@ -888,7 +888,7 @@
 
                         <td valign="top" class="mcnTextContent" style="padding-top:0; padding-right:18px; padding-bottom:9px; padding-left:18px;">
 
-                            <em>Copyright © 2020 Hikaya<br>
+                            <em>Copyright © 2021 Hikaya<br>
 All rights reserved.</em><br>
 <br>
 This email was sent to {{email}} because you told us you forgot your password.