Small whitespace fix in one string in Maps

[Marcus Lundblad <ml update uu se>]

Hi!

Just to inform, there was a small correction, adding a missing space
in one string in gnome-maps:

src/osmEditDialog.js (line 160):

"Contact e-mail address for inquiries. "
"Add only email addresses that are intended to be publicly used."

Adding a missing space after the first full stop (end of the first
sentence) in string.

//Marcus