#1384 : Updated contact us .html file by adding form validations

[GauriBhandari]

Fixes #1384

Changes proposed

I added the form tag which was the main part of the validations in the contact us form. I also changed the type of the phone number and email to their appropriate types so that only those values can be added for better usability.

✔️ Check List (Check all the applicable boxes)

• [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.

[netlify[bot]]

✅ Deploy Preview for aec-library-wbsite ready!

Name	Link
🔨 Latest commit	e35f28c38322a9361f8e050cac4755301a226427
🔍 Latest deploy log	https://app.netlify.com/sites/aec-library-wbsite/deploys/64a2d00f25ed280008397cf5
😎 Deploy Preview	[https://deploy-preview-1410--aec-library-wbsite.netlify.app/public/contact us ](https://deploy-preview-1410--aec-library-wbsite.netlify.app/public/contact us )
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[GauriBhandari]

I have made the requested changes . Please review it and do the needful. Let me know if further changes required. Thank you !