chore(deps): update dependency ipywidgets to v8

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
ipywidgets	7.5.1 → 8.1.8

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[renovate]

⚠ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: thc-net/poetry.lock

Creating virtualenv thc-net-fleaqHJg-py3.12 in /home/ubuntu/.cache/pypoetry/virtualenvs
Updating dependencies
Resolving dependencies...

[SolverProblemError]
The current project's Python requirement (>=3.6.1) is not compatible with some of the required packages Python requirement:
  - ipywidgets requires Python >=3.7

Because thc-net depends on ipywidgets (8.1.2) which requires Python >=3.7, version solving failed.

[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: thc-net/poetry.lock

Updating dependencies
Resolving dependencies...

[SolverProblemError]
The current project's Python requirement (>=3.6.1) is not compatible with some of the required packages Python requirement:
  - ipywidgets requires Python >=3.7

Because thc-net depends on ipywidgets (8.1.8) which requires Python >=3.7, version solving failed.