Add https://tc39.es/proposal-canonical-tz#readme/

[browser-specs-bot]

URL

https://tc39.es/proposal-canonical-tz#readme/

Rationale

• See repository: tc39/proposal-canonical-tz#readme

Additional properties

{}

[browser-specs-bot]

The update could not be built:
Specification name contains unexpected characters: tc39-canonical-tz#readme (extracted from https://tc39.es/proposal-canonical-tz#readme/)

[tidoust]

Will be reported without the fragment once #1456 is merged.