add Probely to the list of integrations.

[tmendo]

adds Probely to the list of integrations.

[tmendo]

friendly ping @valentijnscholten @madchap :)

[valentijnscholten]

This sounds pretty cool, I think Probely is the first integration doing it like this. Is it using import underneath? and also re_import, of just import? Might be good to indicate what kind of permissions the user needs that the API key belongs to.
Would it be beneficials to add something in the docs to say Probely integration has been tested with APIv2 for Defect Dojo 1.5.x-1.6.x or something? Backwards incompatible changes are rare, but may happen.

[tmendo]

friendly reminder to @madchap :)

[madchap]

Please remove the naked probely.com link.