chore: Update tracecov to 0.21.0

[Stranger6667]

No description provided.

[github-actions]

Merging this PR will leave 1 of 2 operations untested. Please review.

❌ 1 untested
✅ 1 tested

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Parameters  ░░░░░░░░░░░░░░░░░░░░    —
Keywords    ░░░░░░░░░░░░░░░░░░░░    —
Responses   ██████████░░░░░░░░░░  1/2    50%
Examples    ░░░░░░░░░░░░░░░░░░░░    —

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❌ Untested (1)

	Method	Path	Parameters	Keywords	Responses	Examples
❌	GET	/api/failure	0/0	0/0	0/1	0/0

🟢 Tested (1)

	Method	Path	Parameters	Keywords	Responses	Examples
🟢	GET	/api/success	0/0	0/0	1/1	0/0

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Powered by TraceCov v0.21.0

_{schemathesis 4.19.0 | http://127.0.0.1:5001/openapi.json}

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