fix: Made the newsletter section responsive on footer

[vishanurag]

PR Description 📜

Fixes #5068

• Made the newsletter section of footer responsive in mobile-view.

---

Mark the task you have completed ✅

• I follow CONTRIBUTING GUIDELINE & CODE OF CONDUCT of this project.
• I have performed a self-review of my own code or work.
• I have commented my code, particularly in hard-to-understand areas.
• My changes generates no new warnings.
• I have followed proper naming convention showed in CONTRIBUTING GUIDELINE
• I have added screenshot for website preview in assets/images
• I have added entries for my game in GameZone's README.md
• I have added README.md in my Game folder
• I have added working video of the game in README.md (optional)
• I have specified the respective issue number for which I have requested the new game.
• I have added my Game to gamesData.json file and it is loading properly on main website as intended.

---

Add your screenshots(Optional) 📸

Please review & merge my pull-request under GSSoC'24

Thank you soo much for contributing to our repository 💗

[kunjgit]

Thank you @vishanurag ,for creating the PR and contributing to our GameZone 💗
Review team will review the PR and will reach out to you soon! 😇
Make sure that you have marked all the tasks that you are done with ✅.
Thank you for your patience! 😀

[vishanurag]

/assign

[vishanurag]

@kunjgit @ishita-43 please review & merge my pull-request under GSSoC'24

[vishanurag]

@ishita-43 mam Can you please also add level1 label on this pr

[kunjgit]

Thank you @vishanurag , for your valuable time and contribution in our GameZone 💗.
It’s our GameZone, so Let’s build this GameZone altogether !!🤝
Hoping to see you soon with another PR again 😇
Wishing you all the best for your journey into Open Source🚀