Fix course info modal to include H1/Y1 suffix in course title

[Japleen-Kaur2409]

Proposed Changes

This pull request fixes a bug in the course information modal where the course title did not display the H1/S1/Y1 suffix (session code).
Previously, the modal header showed only the course code and name (e.g., CSC236 Introduction to the Theory of Computation), which was inconsistent with how courses are labelled elsewhere in the interface.
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Type of Change

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Type	Applies?
🚨 Breaking change (fix or feature that would cause existing functionality to change)
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🚦 Test update (change that only adds or modifies tests)
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Questions and Comments

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[Japleen-Kaur2409]

This test is failing in CourseModalButtons.test.js, Please guide me.

[david-yz-liu]

@Japleen-Kaur2409 nice work!