Fix minor typos in comments and spec names (#21831)

lib/mastodon/media_cli.rb

@@ -24,7 +24,7 @@ module Mastodon
     desc 'remove', 'Remove remote media files, headers or avatars'
     long_desc <<-DESC
       Removes locally cached copies of media attachments (and optionally profile
-      headers and avatars) from other servers. By default, only media attachements
+      headers and avatars) from other servers. By default, only media attachments
       are removed.
       The --days option specifies how old media attachments have to be before
       they are removed. In case of avatars and headers, it specifies how old

lib/tasks/tests.rake

@@ -25,7 +25,7 @@ namespace :tests do
       end
 
       if Account.where(domain: Rails.configuration.x.local_domain).exists?
-        puts 'Faux remote accounts not properly claned up'
+        puts 'Faux remote accounts not properly cleaned up'
         exit(1)
       end