[Bug]: Remove duplicate manifest link in index.html

[gssi962]

Describe the bug

In index.html, the tag is written twice (line 15 and line 21).
This duplication is unnecessary and may cause confusion or redundancy in browser handling of the manifest file.

Steps to Reproduce

Steps to reproduce the behavior:
-Open the index.html file in the project.
-Scroll to lines 15 and 21.
-You will see that the manifest link is included twice.

Expected behavior

The manifest link should be included only once in index.html.

Screenshots

In index.html
Line 15:
Line 21:
The manifest link is included twice, which is unnecessary.

Desktop :

• OS: Windows
• Browser: Chrome
• Version: Not version-specific

Smartphone :

Please complete the following information

• Device: Android
• OS: All
• Browser : Chrome
• Version: Not version-specific

Additional context :

Removing the duplicate line will clean up the HTML and follow best practices (only one manifest link is needed).

Suggested Fix :

Delete the duplicate manifest link (line 15) and keep only one:

[github-actions]

Thank you for raising this issue!

We'll review it as soon as possible. We truly appreciate your contributions! ✨

Meanwhile make sure you've visited the README.md, CONTRIBUTING.md, and CODE_OF_CONDUCT.md before creating a PR for this. Also, please do NOT create a PR until this issue has been assigned to you. 😊

[gssi962]

Hello
I am a GSSoc'25 participant and would like to work on the issue.
I have already identified the issue.
Kindly assign to me so I can create a PR.
Also, please consider adding the labels and level.