Replace `löve` with `love` for the Löve2D keyword

[paulgeringer]

Documentation style bug

Diacritics are hard to type, and this can cause issues for downstream projects that aren't expecting non-ascii names.

Summary

As above, the löve keyword for the Löve2D project documentation is annoying to type and can cause some downstream issues for projects that use the provided keywords for searching.

See https://github.com/chrisgrieser/alfred-docs-searches/pull/19 as an example manifestation of the issue on a downstream project.

Actual style

löve

Expected style

love (or love2d)