chore: fix semester typo in config comments

Agent-Logs-Url: https://github.com/berkeley-cdss/berkeley-class-site/sessions/b541e009-643e-4e51-a543-e291bb28f017

Co-authored-by: cycomachead <1505907+cycomachead@users.noreply.github.com>

Author: Copilot

_config.yml

@@ -35,7 +35,7 @@ course_email: COURSE_EMAIL@berkeley.edu
 gradescope_course_id: 123456 # you can find this in the Gradescope URL after /courses
 bcourses_course_id: 123456 # Same as above, but for bCourses. Leave blank if not in use...
 ed_course_id: 123456 # Again, same as above.
-sememster: spYY | suYY | faYY # set for the current seemester
+semester: spYY | suYY | faYY # set for the current semester
 semester_start_date: '2025-01-21' # Required for the archive banner logic (YYYY-MM-DD)
 semester_end_date: '2025-05-09' # Required for the archive banner logic (YYYY-MM-DD)
 # TODO(setup): Set this to the file path of your course logo image, or leave it blank to display your course name.