DOC: Add functionality to newsletter form

[ananyag309]

What's wrong with the existing documentation

Not functional

Add ScreenShots

No response

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• [X] I'm a GSSOC'24 contributor
• [X] I want to work on this issue

[VaishaliWeb]

Please assign this task to me. I'll complete this sooner

[nishant0708]

hey @XceeDesigns Can i work on this issue