Update rollingshutter.py

Add Yuneec H520 / E90 camera with 44ms rolling shutter speed

opendm/rollingshutter.py

@@ -18,6 +18,8 @@ RS_DATABASE = {
     'dji fc3582': lambda p: 26 if p.get_capture_megapixels() < 48 else 60, # DJI Mini 3 pro (at 48MP readout is 60ms, at 12MP it's 26ms) 
 
     'dji fc350': 30, # Inspire 1
+    
+    'yuneec e90': 44, # Yuneec E90
 
     'gopro hero4 black': 30, # GoPro Hero 4 Black
     'gopro hero8 black': 17, # GoPro Hero 8 Black