chore: fix typos in readme

Author: fjebaker

README.md

@@ -50,7 +50,7 @@ flux = invokemodel(energy, model)
 
 ## About
 
-This is a Julia wrapper of [reltrans](https://github.com/reltrans/reltrans/), which exposes the model to with a [SpectralFitting.jl](https://github.com/JuliaAstro/SpectralFitting.jl) interface.
+This is a Julia wrapper of [reltrans](https://github.com/reltrans/reltrans/), which exposes the model with a [SpectralFitting.jl](https://github.com/JuliaAstro/SpectralFitting.jl) model interface.
 
 For citation information, see [Cititing reltrans](https://github.com/reltrans/reltrans/?tab=readme-ov-file#citing-reltrans).