Fix docstring and type hints for recipe and splits parameters respectively

Author: sugatmahanti

src/llmcompressor/entrypoints/oneshot.py

@@ -241,7 +241,7 @@ def oneshot(
     dataset: str | "Dataset" | "DatasetDict" | None = None,
     dataset_config_name: str | None = None,
     dataset_path: str | None = None,
-    splits: str | list | dict | None = None,
+    splits: str | list[str] | dict[str, str] | None = None,
     num_calibration_samples: int = 512,
     shuffle_calibration_samples: bool = True,
     max_seq_length: int = 384,
@@ -287,7 +287,8 @@ def oneshot(
         tag, or commit id).
 
     # Recipe arguments
-    :param recipe: Path to a LLM Compressor sparsification recipe.
+    :param recipe: Path to a LLM Compressor sparsification recipe, or a list of paths
+      to multiple recipes.
     :param recipe_args: List of recipe arguments to evaluate, in the
         format "key1=value1", "key2=value2".
     :param clear_sparse_session: Whether to clear CompressionSession/