Removal of `ohm` missing from the changelog

[mkorje]

ohm was removed in #14, but isn't mentioned in the changelog for 0.1.0. We must've missed it.

This was brought up on the Discord where a user's document no longer compiled and there was no indication that ohm had been removed.

[MDLC01]

I edited the GitHub release changelog. Changing CHANGELOG.md will require making a pull request here. I'm not sure what should be done regarding the Typst changelog, as editing it retroactively is not very useful.

[laurmaedje]

We can edit it in typst/typst, but it will not immediately be reflected on the website.

[MDLC01]

I opened #53 to close this.