Fixing docstring typo

Author: erikvansebille

src/parcels/_core/utils/time.py

@@ -164,7 +164,7 @@ def timedelta_to_float(dt: float | timedelta | np.timedelta64) -> float:
 
 
 def float_to_datetime(dt: float, time_interval) -> np.datetime64:
-    """Convert a float time ( ins seconds from the start of the time_interval) to a datetime"""
+    """Convert a float time (in seconds from the start of the time_interval) to a datetime"""
     if time_interval:
         return np.timedelta64(int(dt), "s") + time_interval.left
     else: