Fix incorrect course title

Course title was incorrect causing wide range of visual issues as example linkedin certificate import imports the certificate as AI Agents Fundamentals rather than Fundamentals of MCP.

app.py

@@ -23,7 +23,7 @@ EXAM_DATASET_ID = os.getenv("EXAM_DATASET_ID") or "agents-course/unit_1_quiz"
 EXAM_MAX_QUESTIONS = os.getenv("EXAM_MAX_QUESTIONS") or 1
 EXAM_PASSING_SCORE = os.getenv("EXAM_PASSING_SCORE") or 0.8
 CERTIFYING_ORG_LINKEDIN_ID = os.getenv("CERTIFYING_ORG_LINKEDIN_ID", "000000")
-COURSE_TITLE = os.getenv("COURSE_TITLE", "AI Agents Fundamentals")
+COURSE_TITLE = os.getenv("COURSE_TITLE", "Fundamentals of MCP")
 
 ds = load_dataset(EXAM_DATASET_ID, split="train")