fix: align Q1 heading with corrected assignment scope

The mart's data runs 2023-12-31..2024-01-31, so "across all of January 2024"
was inaccurate. Match the reworded curriculum question ("the whole loaded
dataset"). Pairs with hyf-datatrack assignment data-fact fixes.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: Lasse Benninga

reports/answers.md

@@ -2,7 +2,7 @@
 
 Queries run against `dev_<your_name>.fct_daily_borough_stats`.
 
-## Q1: Highest total `total_fare` across all of January 2024
+## Q1: Highest total `total_fare` across the whole loaded dataset
 
 **SQL:**