bug-fix as per description in ENSCORESW-3452. change in data_uri for …

Created by: ameya1981

…MIM2Gene.

Requirements

• Filling out the template is required. Any pull request that does not include enough information to be reviewed in a timely manner may be closed at the maintainers' discretion;
• Review the contributing guidelines for this repository; remember in particular:
  • do not modify code without testing for regression
  • provide simple unit tests to test the changes
  • if you change the schema you must patch the test databases as well, see Updating the schema
  • the PR must not fail unit testing

Description

Change in data_uri for MIM2Gene xref

Use case

Fix as per description in ENSCORESW-3452. Same change to be made in production repo for xref_config.json

Benefits

Correct source for the parser.

Possible Drawbacks

NA

Testing

NA

If so, do the tests pass/fail?

NA