Fix: Replace outdated command name "project" with "weasel"

[schorfma]

Hello Explosion team,

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I suggest the replacement of the outdated command name in a hint message.

Description

In a hint message, when running a command with unmet dependencies, the weasel assets command was still referenced as project assets (from the time when weasel was still included in spaCy as spacy project command).

Types of change

The command name project is updated within the hint to reflect the current command name weasel.

Checklist

• I confirm that I have the right to submit this contribution under the project's MIT license.
• I ran the test suite, and all new and existing tests passed.
• My changes don't require a change to the documentation, or if they do, I've added all required information.

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Best regards
Martin