Merge pull request #84 from mindsdb/prepare_branch_rename

[DONT MERGE] Update links for main repo branch rename

Author: hamishfagg

README.md

@@ -68,7 +68,7 @@ Being part of the core team is accessible to anyone who is motivated and wants t
 
 If you'd like to contribute to the project, refer to the [contributing documentation](https://docs.mindsdb.com/contribute/?utm_medium=community&utm_source=github&utm_campaign=mindsdb%20repo).
 
-Please note that this project is released with a [Contributor Code of Conduct](https://github.com/mindsdb/mindsdb/blob/stable/CODE_OF_CONDUCT.md). By participating in this project, you agree to abide by its terms.
+Please note that this project is released with a [Contributor Code of Conduct](https://github.com/mindsdb/mindsdb/blob/main/CODE_OF_CONDUCT.md). By participating in this project, you agree to abide by its terms.
 
 ## Installing additional dependencies