Typo in the docs

Hello, in the docs, article [Introduction to Nalgebra](https://rapier.rs/docs/user_guides/rust/introduction_to_nalgebra), there is the following typo:
`Rapier mostly uses 2D and 3D vectors: the Vector2 and Vector3 type aliases form nalgebra.`
that should be replaced with
`Rapier mostly uses 2D and 3D vectors: the Vector2 and Vector3 type aliases from nalgebra.`

Open the linked Introduction to Nalgebra article and locate the quoted sentence about Vector2 and Vector3 type aliases. Correct the wording from “form nalgebra” to “from nalgebra,” then reread the paragraph to confirm the typo is fixed.

Written by the indexing model from the issue text.