Update README.md

Author: MoshiMoshi0

README.md

@@ -372,6 +372,14 @@ The source code also provides an easy way to write your own **speed controller**
     "Determines how to handle led color count"
     "mismatch generated by effects"
     "One of: [DoNothing, Lerp, Nearest, Wrap, Trim, Copy]"
+    
+    "DoNothing: do nothing"
+    "Lerp: stretches or shrinks effect colors list to match the configured LedCount using a gradient"
+    "Nearest: stretches or shrinks effect colors list to match the configured LedCount by copying/removing the nearest color"
+    "Wrap: if effect colors list is bigger than LedCount, wrap the remainder to the beginning, otherwise do nothing"
+    "Trim: if effect colors list is bigger than LedCount, trim the excess, otherwise do nothing"
+    "Copy: if effect colors list is smaller than LedCount, copy the colors untill they are equal, otherwise do nothing"
+
     "LedCountHandling": "<string>",
 
     "Led rotation/offset for rgb effects"