Fix static instance name in emails (Z#23224360) (#5914)

src/pretix/control/templates/pretixcontrol/email/confirmation_code.txt

@@ -9,5 +9,5 @@ Please do never give this code to another person. Our support team will never as
 If this code was not requested by you, please contact us immediately.
 
 Best regards,
-Your pretix team
+Your {{ instance }} team
 {% endblocktrans %}

src/pretix/control/templates/pretixcontrol/email/forgot.txt

@@ -5,5 +5,5 @@ you requested a new password. Please go to the following page to reset your pass
 {{ url }}
 
 Best regards,  
-Your pretix team
-{% endblocktrans %}
+Your {{ instance }} team
+{% endblocktrans %}

src/pretix/control/templates/pretixcontrol/email/invitation.txt

@@ -1,6 +1,6 @@
 {% load i18n %}{% blocktrans with url=url|safe %}Hello,
 
-you have been invited to a team on pretix, a platform to perform event
+you have been invited to a team on {{ instance }}, a platform to perform event
 ticket sales.
 
 Organizer: {{ organizer }}
@@ -13,5 +13,5 @@ If you do not want to join, you can safely ignore or delete this email.
 
 Best regards,  
 
-Your pretix team
+Your {{ instance }} team
 {% endblocktrans %}

src/pretix/control/templates/pretixcontrol/email/security_notice.txt

@@ -1,6 +1,6 @@
 {% load i18n %}{% blocktrans with url=url|safe messages=messages|safe %}Hello,
 
-this is to inform you that the account information of your pretix account has been
+this is to inform you that the account information of your {{ instance }} account has been
 changed. In particular, the following changes have been performed:
 
 {{ messages }}
@@ -12,5 +12,5 @@ You can review and change your account settings here:
 {{ url }}
 
 Best regards,  
-Your pretix team
+Your {{ instance }} team
 {% endblocktrans %}