assets/add_forge_now: Fix trailing whitespaces in email template

assets/src/bundles/add_forge/forge-admin-email.ejs

@@ -20,11 +20,11 @@ Software Heritage archive.
 
 Please let us know if there are any technical issues to consider before
  we launch the archival of the public repositories hosted on your
- infrastructure.(use "Reply all" to ensure our system will process 
+ infrastructure.(use "Reply all" to ensure our system will process
  your answer properly)
 
-In the absence of an answer to this message, we will start to archive 
-your forge in the coming weeks (only the publicly accessible 
+In the absence of an answer to this message, we will start to archive
+your forge in the coming weeks (only the publicly accessible
 repositories will be archived)
 
 Thank you in advance for your help.