Update Arabic translations

Description

This PR updates the Arabic translations.

*JIRA tickets*: BB-2257

*Screenshots*: Always include screenshots if there is any change to the UI.

*Sandbox URL*: TBD - sandbox is being provisioned.

*Merge deadline*: None

*Testing instructions*: TBD

Assignee

Unassigned

Reporter

Open Source Pull Request Bot

Labels

Contributor Name

Paulo Viadanna

Repo

edx/edx-platform

Customer

Epic Link

None

OSCM Assignee

None

Platform Map Area (Levels 1 & 2)

Learner Experiences - Course Experience

Platform Map Area (Levels 3 & 4)

None

Blended Hour Utilization Percentage

None

Priority

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