Fix constructor name to match class name

Author: Vijay

+deepinterp/Datastore.m

@@ -36,7 +36,7 @@
     end
 
     methods % begin methods section
-        function myds = DeepInterpolationDataStore(filePath, options)
+        function myds = Datastore(filePath, options)
             arguments
                 filePath
                 options = struct();