Fix typo in URLs

Signed-off-by: Jesse Whitehouse <[email protected]>

Author: susodapop

CONTRIBUTING.md

@@ -1,4 +1,4 @@
-We happily welcome contributions to the `databricks-sql-connector` package. We use [GitHub Issues](https://githaub.com/databricks/databricks-sql-python/issues) to track community reported issues and [GitHub Pull Requests](https://githaub.com/databricks/databricks-sql-python/pulls) for accepting changes.
+We happily welcome contributions to the `databricks-sql-connector` package. We use [GitHub Issues](https://github.com/databricks/databricks-sql-python/issues) to track community reported issues and [GitHub Pull Requests](https://github.com/databricks/databricks-sql-python/pulls) for accepting changes.
 
 Contributions are licensed on a license-in/license-out basis.
 
@@ -102,5 +102,5 @@ poetry run pytest tests/tests.py::ClientTestSuite::test_closing_connection_close
 This project uses [Black](https://pypi.org/project/black/).
 
 ```
-poetry run black src
+poetry run python -m black src
 ```