upgrade quimb and cotengra versions

[andrijapau]

Context:

This demo was getting random warnings,

/home/runner/work/qml/qml/venv/lib/python3.10/site-packages/cotengra/hyperoptimizers/hyper.py:57: UserWarning: Couldn't find `optuna`, `cmaes`, or `nevergrad` so will use completely random sampling in place of hyper-optimization.
  warnings.warn(
/home/runner/work/qml/qml/venv/lib/python3.10/site-packages/cotengra/hyperoptimizers/hyper.py:76: UserWarning: Couldn't find `optuna`, `cmaes`, or `nevergrad` so will use completely random sampling in place of hyper-optimization.
  warnings.warn(

which seemed to only occur with cotengra <= 0.7.4.

Description of the change:

By upgrading cotengra (and quimb ... why not?), the warnings disappear.

Benefits:

No more warnings,

[andrijapau]

Had to manually force cotengra's version as without it quimb would install cotengra==0.7.4. 🤔

[github-actions]

Thank you for opening this pull request.

You can find the built site at this link.

Deployment Info:

• Pull Request ID: 1420
• Deployment SHA: 9418ed054bc5f36d1a7f35b7481dcda444b67fd7
  (The Deployment SHA refers to the latest commit hash the docs were built from)

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[PietropaoloFrisoni]

❤️