Update BrowserDetect.pm - Fix github URL

Change URL from

https://github.com/hobbestigrou/Dancer2-Plugin-BrowserDetect

To:

https://github.com/hobbestigrou/Dancer2-Plugin-Browser

As per https://rt.cpan.org/Public/Bug/Display.html?id=92807
Merge pull request #1 from MartinMcGrath/patch-1

Update BrowserDetect.pm - Fix github URL