chore: update dependency mocha to v12

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
mocha (source)	^11.8.0 → ^12.0.0

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Release Notes

mochajs/mocha (mocha)

v12.0.0

Compare Source

🩹 Fixes

• fixup parsing negative numbers and quoted strings (#​6250) (2962875)
• preserve FIFO descriptors when respawning (#​6254) (3bb317d)

📚 Documentation

• fix minor correctness issues (#​6215) (e6b9ee7)
• link to mochajs.org instead of the wiki (#​6216) (8720225)

🧹 Chores

• setup Release Please for v12 stable (#​6084) (219674f)

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