Update contributing/testing-best-practices.md

Co-authored-by: maastha <[email protected]>

contributing/testing-best-practices.md

@@ -3,7 +3,7 @@
 
 ## Types of test
 
-- Unit tests: In Terraform terminology they refer to tests that [validate a resource schema](https://developer.hashicorp.com/terraform/plugin/framework/handling-data/schemas#unit-testing). That is done automatically [here](https://github.com/mongodb/terraform-provider-mongodbatlas/blob/master/internal/provider/provider_test.go) for all resources and data sources using Terraform Framework Plugin. Here we’re referring to the broader concept of testing a resource or unit without calling the external systems like the Atlas Go SDK.
+- Unit tests: In Terraform terminology they refer to tests that [validate a resource schema](https://developer.hashicorp.com/terraform/plugin/framework/handling-data/schemas#unit-testing). That is done automatically [here](https://github.com/mongodb/terraform-provider-mongodbatlas/blob/master/internal/provider/provider_test.go) for all resources and data sources using Terraform Framework Plugin. Additionally, we have general unit testing for testing a resource or unit without calling the external systems like the Atlas Go SDK.
 - Acceptance (acc) tests: In Terraform terminology they refer to the use of real Terraform configurations to exercise the code in plan, apply, refresh, and destroy life cycles (real infrastructure resources are created as part of the test).
 - Migration (mig) tests: These tests are designed to ensure that after an upgrade to a new Atlas provider version, user configs do not result in unexpected plan changes. Migration tests are a subset of Acceptance tests.