Rename "Manage Proposal" to "My Proposals" (Student View)

[MImran2002]

Description: Student navigating in their CCE Minor Profile should have My Proposals instead of Manage Proposal within the two tabs. This is to improve clarity. Wording for admin can remain unchanged.

[Shouryaverma19]

Hello! I can help implement this wording improvement for the student navigation tabs by renaming the text to "My Proposals". Could you please assign this task to me? Thank you!