FIX: Nightgrip missing "taken" keyword in description

[Ciccooz]

Fixes #7379

Description of the problem being solved:

Nightgrip was missing the "taken" keyword and this led to an incorrect calculation of Effective Hit Pool

Steps taken to verify a working solution:

Imported the build below and compared the equipped Nightgrip with the one selected from the uniques tab, now the Effective Hit Pool is not messed up

Link to a build that showcases this PR:

https://pobb.in/gVGiXS9lqxya

Before screenshot:

After screenshot: