fix: session_language url renamed to update_language

[navinkarkera]

Description

The url was renamed from session_language to update_language but it was still referred to in some html templates. Without this change, any instance with multiple languages configured via Darklang will raise error in the dashboard.

Useful information to include:

• Which edX user roles will this change impact: "Learner", "Course Author", "Developer", and "Operator".

Testing instructions

• In master branch
• Enable multiple languages via darklang. Tutorial link
• Logout and try to visit home url: http://localhost:18000/dashboard in case of devstack.
• It will raise 500 error.
• Checkout this PR and it should be fixed.

Deadline

"None" if there's no rush, or provide a specific date or event (and reason) if there is one.

Other information

Include anything else that will help reviewers and consumers understand the change.

• Does this change depend on other changes elsewhere?
• Any special concerns or limitations? For example: deprecations, migrations, security, or accessibility.
• If your database migration can't be rolled back easily.

[openedx-webhooks]

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[navinkarkera]

@Agrendalath This is a bug fix, would you be able to merge this as CC.

[open-craft-grove]

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[Agrendalath]

👍

• I tested this: anonymous users can now view the pages when the language picker is enabled
• I read through the code
• I checked for accessibility issues: n/a
• Includes documentation: n/a

[Agrendalath]

@navinkarkera, I tested this and left my +1. Would you be able to handle the merging part?

[navinkarkera]

@Agrendalath Sure, thanks!

[open-craft-grove]

Sandbox update request received. Deployment will start soon.

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Sandbox deployment started.

[open-craft-grove]

Sandbox deployment successful.

Sandbox LMS is available at pr-33729-139931.staging.do.opencraft.hosting
Sandbox Studio is available at studio.pr-33729-139931.staging.do.opencraft.hosting

[openedx-webhooks]

@navinkarkera 🎉 Your pull request was merged! Please take a moment to answer a two question survey so we can improve your experience in the future.

[open-craft-grove]

Sandbox update request received. Deployment will start soon.

[edx-pipeline-bot]

2U Release Notice: This PR has been deployed to the edX staging environment in preparation for a release to production.

[edx-pipeline-bot]

2U Release Notice: This PR has been deployed to the edX production environment.