Update index.html

[ananyag309]

In contact us section after the user submits the form successfully, they see an alert box with the message "Email sent successfully! but the form is not reset. I have modified the code so that the form will be reset, providing a better user experience.

Title and Issue number

Title :

Issue No. :

Code Stack :

Close #<issue_no>

Description

Video/Screenshots (mandatory)

Type of PR

• Bug fix
• Feature enhancement
• Documentation update
• Other (specify): _______________

Checklist:

• I have performed a self-review of my code.
• I have commented my code, particularly in hard-to-understand areas.
• I have tested the changes thoroughly before submitting this pull request.
• I have provided relevant issue numbers, screenshots, and videos after making the changes.
• I have gone through the contributing.md file before contributing

Additional context:

##Are you contributing under any Open-source programme?

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