Updated Phone-Number Test cases ( tests.toml & phone_number_test.cpp)

[tanno1]

first PR here.

used configlet to update tests.toml for phone numbers against the problem-specifications reqs, then went through problem-specs repo, tests.toml, and phone_number_test.cpp and updated cases accordingly to include the correct cases.

[github-actions]

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[tanno1]

Just realized I need to make some updates in the TEST_CASE() function and add in the UUIDs. I looked through previously merged commits and saw that. I will update and re pr tonight.