Youtube links added with scrollbar in some pages

[Siddhi-Mundada]

🛠️ Fixes Issue

#864

👨‍💻 Changes proposed

1)Added YouTube links in the footer which will open in new tab after clicking.(In about ,contributors, donate, contact page, Privacy Policy ,terms and condition, resource page) 2)Added scrollbar in login, review section, recovery password pages

✔️ Check List

• [X] My code follows the code style of this project.
• [X] This PR does not contain plagiarized content.
• [X] The title of my pull request is a short description of the requested changes.

Please review the PR. Thanks in Advance!

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[Siddhi-Mundada]

Please review PR. Thanks in advance!