Make Arbitrary Lines Narrower - Shrink Line Width?

[Punchcard]

GIMP Version 2.10.32
I have a JPG file of an image of a hand-written signature.
The line is too wide.
How can I make the line narrower?
I've attached part of the JPG file.
   

[denzjos]

I've used G'Mic-Qt / Repair / Anti Alias and moved the sliders to the right to have this result :
   

[Punchcard]

Thanks!
I tried it. Works nicely.