Human Resources Question

I do not think this is a huge deal, unless perhaps you were applying for a position that would include extreme attention to detail in documentation.

I would just send a brief follow-up e-mail with the correction and an apology.  I would begin with your original e-mail, so the subject line is intact (assuming it references the job title, etc) and reply to it - but add "Correction" in the subject line.  Are you beyond the application date at this point?  I would do this quickly regardless.

I have only been in the position of job seeker, but this seems reasonable to me. People make mistakes, it's how you handle them that counts.

I know I'm a little late to the party, but I agree completely.  It would tell me a lot about your character if I received an email with the correction.

Hope it turned out well, and good luck on the job hunt.