[BUG] GitSigns background does not match SignColor background

[niil-qb]

Describe the bug

GitSigns background color does not match the SignColumn background.

fixed here:
https://github.com/niilohlin/gruvbox.nvim/tree/fix-gitsigns

Expected behaviour

The color for GitSigns should have the -Sign color:

      GitSignsAdd = { link = "GruvboxGreenSign" },
      GitSignsChange = { link = "GruvboxOrangeSign" },
      GitSignsDelete = { link = "GruvboxRedSign" },

Screenshots

expected:

actual:

[moshpirit]

Newbie here, thanks @niil-qb for the bug report, is there any way that we can solve this issue manually?