Improve Arabic translation

[kalmufti]

• I have read freeCodeCamp's contribution guidelines.
• My pull request has a descriptive title (not a vague title like Update index.md)
• My pull request targets the master branch of freeCodeCamp.
• None of my changes are plagiarized from another source without proper attribution.
• All the files I changed are in the same world language (for example: only English changes, or only Chinese changes, etc.)
• My changes do not use shortened URLs or affiliate links.

[gitpod-io]

[raisedadead]

Hi @kalmufti thanks for your pull request, can you get someone who speaks the language to do a peer review of the PR? You can also request them to take a look at all of your other PRs if any. Thanks.

[RandellDawson]

Adding to what @raisedadead said, these are all 6 of the Arabic PRs that need to be reviewed for complete and correct translation of their English versions.

[ahmaxed]

Thanks for improving the Arabic translation @kalmufti.