"/> in upper left corner

I noticed strange characters in upper left corner of my wordpress web site, “/>. I did some research on this forum, and found multiple problems description with multiple solutions, but none of them worked for me. Disabling plugins, changing themes, checking header.php did not help as well. I did found few instances of those characters in this particular order but removing them did not fix my problem. Any idea what the heck is going on?

Web site is https://dental-toronto.com, thanks