fix use of http URLs, fix ietf-tools#4702 (ietf-tools#4707)

Author: ajeanmahoney

ietf/dbtemplate/fixtures/nomcom_templates.xml

@@ -41,7 +41,7 @@ You have been nominated for the position of $position.
 
 The NomCom would appreciate receiving an indication of whether or not you accept this nomination to stand for consideration as a candidate for this position.
 
-You can accept the nomination via web going to the following link http://$domain$accept_url or decline the nomination going the following link http://$domain$decline_url
+You can accept the nomination via web going to the following link https://$domain$accept_url or decline the nomination going the following link https://$domain$decline_url
 
 If you accept, you will need to fill out a questionnaire.  You will receive the questionnaire by email.
 
@@ -107,7 +107,7 @@ You have been nominated for the position of $position.
 
 The NomCom would appreciate receiving an indication of whether or not you accept this nomination to stand for consideration as a candidate for this position.
 
-You can accept the nomination via web going to the following link http://$domain$accept_url or decline the nomination going the following link http://$domain$decline_url
+You can accept the nomination via web going to the following link https://$domain$accept_url or decline the nomination going the following link https://$domain$decline_url
 
 If you accept, you will need to fill out a questionnaire.