docs: refactor several sections (#8570)

docs/developer-guide/unit-testing.md

@@ -39,7 +39,7 @@ To execute the Prowler test suite, install the necessary dependencies listed in
 
 ### Prerequisites
 
-If you have not installed Prowler yet, refer to the [developer guide introduction](./introduction.md#get-the-code-and-install-all-dependencies).
+If you have not installed Prowler yet, refer to the [developer guide introduction](./introduction.md#getting-the-code-and-installing-all-dependencies).
 
 ### Executing Tests
 
@@ -520,7 +520,7 @@ Execute tests on the service `__init__` to ensure correct information retrieval.
 
 While service tests resemble *Integration Tests*, as they assess how the service interacts with the provider, they ultimately fall under *Unit Tests*, due to the use of Moto or custom mock objects.
 
-For detailed guidance on test creation and existing service tests, refer to the [AWS checks test](./unit-testing.md#checks) [documentation](https://github.com/prowler-cloud/prowler/tree/master/tests/providers/aws/services).
+For detailed guidance on test creation and existing service tests, check the current [AWS checks implementation](https://github.com/prowler-cloud/prowler/tree/master/tests/providers/aws/services).
 
 ## GCP