Update CHANGELOG.md

CHANGELOG.md

@@ -1,6 +1,8 @@
-# Changelog — EV Charging Stations Dataset
-
-- Initial global snapshot  
-- **242,417 stations** across **121 countries**  
-- Added derived columns: `power_class`, `is_fast_dc`  
-- Included companion files: country summary, world summary, EV models  
+## v1.0.0 — 2025-09-15
+- Initial global snapshot of EV charging infrastructure.
+- 242,417 charging stations across 121 countries.
+- Added derived columns: `power_class`, `is_fast_dc`.
+- Added companion tables:
+  - `country_summary.csv`
+  - `world_summary.csv`
+  - `ev_models.csv`