Fixed missing hamburger menu

[Tammy-Ajoko]

Summary

Fixes #183

Added the missing hamburger icon

List of changes proposed in this PR (pull-request)

• Added hamburger icon from index.html to ar-index.html.

What should a reviewer concentrate their feedback on?

• [x] Everything looks ok?

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[Tammy-Ajoko]

@BatoolMM I noticed this issue please kindly review @alswajiab

[BatoolMM]

@all-contributors please add @Tammy-Ajoko for infra

[allcontributors[bot]]

@BatoolMM

I've put up a pull request to add @Tammy-Ajoko! :tada: