updated doc link for Dynatrace integration (#444)

# Description

What - Updated the documentation link for the dynatrace integration.
Why - the current link was leading to 404 page.
How -

## Type of change

Please leave one option from the following and delete the rest:

- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] New Integration (non-breaking change which adds a new integration)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] Non-breaking change (fix of existing functionality that will not
change current behavior)
- [ ] Documentation (added/updated documentation)

## Screenshots

Include screenshots from your environment showing how the resources of
the integration will look.

## API Documentation

Provide links to the API documentation used for this integration.

integrations/dynatrace/README.md

@@ -2,6 +2,6 @@
 
 An integration used to import dynatrace resources into Port.
 
-#### Install & use the integration - [Integration documentation](https://docs.getport.io/build-your-software-catalog/sync-data-to-catalog/incident-management/dynatrace) *Replace this link with a link to this integration's documentation*
+#### Install & use the integration - [Integration documentation](https://docs.getport.io/build-your-software-catalog/sync-data-to-catalog/apm-alerting/dynatrace/)
 
 #### Develop & improve the integration - [Ocean integration development documentation](https://ocean.getport.io/develop-an-integration/)