refactor(tests): rename OCPP16VendorParametersKey test to match source file

Rename to Configuration.test.ts to follow the established convention
where test file names match their corresponding source file names.

diff --git a/tests/types/ocpp/1.6/OCPP16VendorParametersKey.test.ts b/tests/types/ocpp/1.6/Configuration.test.ts
similarity index 100%
rename from tests/types/ocpp/1.6/OCPP16VendorParametersKey.test.ts
rename to tests/types/ocpp/1.6/Configuration.test.ts