fix(isMobilePhone): update tg-TJ locale to include all valid operator codes

[easedu]

Description

Fixes the tg-TJ (Tajikistan) regex in isMobilePhone which was
incorrectly rejecting valid mobile phone numbers, as reported in #2544.

Problem

The existing regex did not cover all valid Tajik mobile operator codes.
Numbers with codes 90 and 91 were incorrectly rejected:

validator.isMobilePhone('+992901234567', 'tg-TJ') // false (should be true)
validator.isMobilePhone('+992911234567', 'tg-TJ') // false (should be true)

Fix

Updated the regex to include all valid operator codes for Tajikistan:
00, 55, 88, 90, 91, 92, 93, 95, 98, 99.

Tests

Added test cases for previously failing numbers and ensured existing
valid numbers continue to pass.

Checklist

• PR contains only changes related; no stray files, etc.
• README updated (where applicable)
• Tests written (where applicable)
• References provided in PR (where applicable)

Closes #2544

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (b1aea75) to head (97dade2).

Additional details and impacted files

@@            Coverage Diff            @@
##            master     #2679   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          114       114           
  Lines         2595      2595           
  Branches       659       659           
=========================================
  Hits          2595      2595           

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