fix(course-page): fix page reload after selecting language on the course page

[VasylMarchuk]

Closes #3658

Brief

TBD

Checklist

• I've thoroughly self-reviewed my changes
• I've added tests for my changes, unless they affect admin-only areas (or are otherwise not worth testing)
• I've verified any visual changes using Percy (add a commit with [percy] in the message to trigger)

[github-actions]

Test Results

  1 files  ±0    1 suites  ±0   6m 39s ⏱️ ±0s
707 tests ±0  641 ✅  - 3  63 💤 ±0  0 ❌ ±0  3 🔥 +3 
722 runs  ±0  653 ✅  - 6  63 💤 ±0  3 ❌ +3  3 🔥 +3 

For more details on these errors, see this check.

Results for commit 855b490. ± Comparison against base commit 31c101d.

♻️ This comment has been updated with latest results.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!

[codecov]

Bundle Report

Changes will increase total bundle size by 2.79kB (0.01%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
client-array-push	39.36MB	2.79kB (0.01%) ⬆️

Affected Assets, Files, and Routes:

view changes for bundle: client-array-push

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
assets/chunk.*.js	2.79kB	392.05kB	0.72%

Files in assets/chunk.*.js:

• ./controllers/course.ts → Total Size: 15.05kB

• ./controllers/course/introduction.ts → Total Size: 1.69kB

• ./routes/course.ts → Total Size: 6.77kB

• ./routes/course/stage.ts → Total Size: 2.3kB

[codecov]

Bundle Report

Changes will increase total bundle size by 490 bytes (0.0%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
client-array-push	39.47MB	490 bytes (0.0%) ⬆️

Affected Assets, Files, and Routes:

view changes for bundle: client-array-push

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
assets/chunk.*.js	490 bytes	389.05kB	0.13%

Files in assets/chunk.*.js:

• ./routes/course.ts → Total Size: 6.98kB

• ./controllers/course/introduction.ts → Total Size: 1.88kB

• ./controllers/course.ts → Total Size: 11.95kB