Rename MultilingualSimplification.py to MultiSim.py

Huggingface requires that the data loader file is named the same as the repo

MultilingualSimplification.py → MultiSim.py

@@ -206,7 +206,7 @@ _LANGUAGES = {
 }
 
 
-class MultilingualSimplification(datasets.GeneratorBasedBuilder):
+class MultiSim(datasets.GeneratorBasedBuilder):
     """MultiSim is a growing collection of Text Simplfication datasets in multiple languages.  Each dataset is a set of complex and simple sentence pairs."""
 
     VERSION = datasets.Version("1.0.0")