Update isMobilePhone.js

[saikiran76]

regex pattern for 'fa-IR: '

This updated pattern allows for any digit after '9' and ensures that the phone number starts with '09' and is followed by 9 digits. With this change, the regex pattern will correctly match Iranian mobile phone numbers in the "09xx xxx xxxx" format.

Refer: [https://en.wikipedia.org/wiki/Telephone_numbers_in_Iran]

Checklist

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