fix: update hk-equity-strategies pin for QPK 247911c compatibility

Co-Authored-By: Claude <noreply@anthropic.com>

Author: Pigbibi

requirements.txt

@@ -2,7 +2,7 @@ flask
 gunicorn
 quant-platform-kit @ git+https://github.com/QuantStrategyLab/QuantPlatformKit.git@247911c
 us-equity-strategies @ git+https://github.com/QuantStrategyLab/UsEquityStrategies.git@0463457a04b5f1041735361139669e354f873702
-hk-equity-strategies @ git+https://github.com/QuantStrategyLab/HkEquityStrategies.git@dbbefb688cd144837aa59581b1930a14c11411ad
+hk-equity-strategies @ git+https://github.com/QuantStrategyLab/HkEquityStrategies.git@6b2590e31a86e532de1eeeeb3c5371435fa47a14
 pandas
 requests
 pytz