QuTiP 5.1.1

Patch to add support for scipy 1.15.

Features

• qutip.cite() now cites the QuTiP 5 paper, https://arxiv.org/abs/2412.04705 (#2592).
• Added QuTiP family package information to qutip.about(). (#2604)

Bug Fixes

• Fix support for calculating the eigenstates of ENR operators (#2595).
• Update various functions to use sph_harm_y when using scipy >= 1.15 (#2593).
• Update mkl finding to support the 'emscripten' sys.platform. (#2606)