fix unit tests

Author: darynaishchenko

airbyte_cdk/sources/file_based/config/file_based_stream_config.py

@@ -90,7 +90,7 @@ def validate_input_schema(cls, v: Optional[str]) -> Optional[str]:
         return None
 
     @root_validator
-    def validate_discovery_related_fields(cls, values):
+    def validate_discovery_related_fields(cls, values: dict) -> dict:
         """
         Please update this validation when new related to schema discovery field is added.
         Validates schema discovery options compatability.

unit_tests/sources/file_based/scenarios/csv_scenarios.py

@@ -488,7 +488,7 @@
                                 "use_first_found_file_for_schema_discovery": {
                                     "default": False,
                                     "description": "When enabled, the source will use the first found file for schema discovery. Helps to avoid long discovery step",
-                                    "title": "Use first found file for schema discovery",
+                                    "title": "Use First Found File For Schema Discover",
                                     "type": "boolean",
                                 },
                             },