This seems to be a common problem:
When you write a web address at the end of a sentence, should you follow it with punctuation, or use no punctuation (to help avoid breaking the web link)?
For example, should I write…
Who likes www.chow.com?
or just
Who likes www.chow.com
??
In years past this was a real problem, but these days you can stop worrying about it.
Using Microsoft Word, Gmail, Outlook, etc., punctuation will not cause a problem — the software has caught up and it will create an accurate link for you, in spite of any punctuation that follows it.