msgid "Go back to <ulink url=\"https://admin.fedoraproject.org/accounts/\"/> and
log in with your password. The welcome page will be displayed, and it reminds
you that CLA is not completed and that an SSH key is not submitted."
..that a SSH key is...
In this case, the original content is incorrect. The choice of which article to use, 'a' or 'an', is made by the sound of the first letter of the word following the article. The 'a' is used when the initial sound is a consonant, the 'an' is used when the initial sound is a vowel. The word 'SSH' starts with the "ess" sound, so the 'an' is used.