Change column name for consistency

gene_benchmark/encoder.py

@@ -359,7 +359,7 @@ def summary(self, short=True):
  summary_dict["missing_entities"] = ",".join(
  [str(v) for v in self.missing_entities]
  )
- summary_dict["num_of_missing_entities"] = len(self.missing_entities)
+ summary_dict["num_missing_entities"] = len(self.missing_entities)
  summary_dict["allow_missing"] = self.allow_missing
  summary_dict["randomize_missing"] = self.randomize_missing
  return summary_dict