community: Fix for Pydantic model validator of GoogleApiClient (#29346)

- [ *] **PR message**: ***Delete this entire checklist*** and replace
with
- **Description:** Fix for pedantic model validator for GoogleApiHandler
    - **Issue:** the issue #29165 

- [ *] **Lint and test**: Run `make format`, `make lint` and `make test`
from the root of the package(s) you've modified.

---------

Signed-off-by: Bhav Sardana <sardana.bhav@gmail.com>

libs/community/langchain_community/document_loaders/youtube.py

@@ -52,14 +52,14 @@ class GoogleApiClient:
 
     @model_validator(mode="before")
     @classmethod
-    def validate_channel_or_videoIds_is_set(cls, values: Dict[str, Any]) -> Any:
+    def validate_channel_or_videoIds_is_set(cls, values: Any) -> Any:
         """Validate that either folder_id or document_ids is set, but not both."""
 
-        if not values.get("credentials_path") and not values.get(
+        if not values.kwargs.get("credentials_path") and not values.kwargs.get(
             "service_account_path"
         ):
             raise ValueError("Must specify either channel_name or video_ids")
-        return values
+        return values.kwargs
 
     def _load_credentials(self) -> Any:
         """Load credentials."""