Trademark symbol (TM) renders too big

When using the Trademark symbol (™) in a markdown file, and viewing that file from gitlab, it renders too big.

How it looks (see: https://gitlab.com/ricardoquesada/unijoysticle2/blob/master/README.md ). Screenshot:

How it should look:

When rendering the same file using another renderer:

How Wikipedia renders it ( https://en.wikipedia.org/wiki/Trademark_symbol )