Yaml files location has to be updated in TH user guide

[Survensa]

Describe the bug

The location ~/certification-tool/backend/test_collections/sdk_tests/sdk_checkout/yaml_tests/yaml/sdk/ has to be updated with ~/certification-tool/backend/test_collections/matter/sdk_tests/sdk_checkout/yaml_tests/yaml/sdk in Updating Existing Yaml Test Script and Customized Test Scripts (Yaml/Python Tests)

https://github.com/project-chip/certification-tool/blob/main/docs/Matter_TH_User_Guide/Matter_TH_User_Guide.adoc#46-customized-test-scripts-yamlpython-tests