Update email regex to support TLDs of any length

[MDeLuise]

Hey Plant-it community!
This PR fixes #274, i.e. updates the regular expression used for validating email addresses to accommodate Top-Level Domains (TLDs) of any length.

What's new?

• Regex Update: The regex pattern has been modified to allow TLDs with 2 or more characters, removing the previous limit of 4 characters. This change ensures compatibility with a wider range of TLDs, including newer and longer ones.

Why is it important?

• Support for Modern TLDs: The previous regex did not support TLDs longer than 4 characters, which could exclude valid email addresses with TLDs such as .photography or .green. This update ensures that email validation is more robust and aligns with current domain naming practices.
• Local and Custom TLDs: The update addresses issues faced by users with local email servers or custom TLDs longer than 4 characters, ensuring better compatibility and functionality.

How to Use?

• Validation: The updated regex will now correctly validate email addresses with TLDs of any length, improving the accuracy of email format checks.

Cheers and happy planting! 🌿🌼

[github-actions[bot]]

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