updating docstring

haystack/components/preprocessors/recursive_splitter.py

@@ -62,9 +62,10 @@ def __init__(  # pylint: disable=too-many-positional-arguments
         """
         Initializes a RecursiveDocumentSplitter.
 
-        :param split_length: The maximum length of each chunk in characters.
+        :param split_length: The maximum length of each chunk by default in characters, but can be in words.
+            See the `split_units` parameter.
         :param split_overlap: The number of characters to overlap between consecutive chunks.
-        :param split_units: The unit of the split_length parameter. It can be either "words" or "char".
+        :param split_units: The unit of the split_length parameter. It can be either "word" or "char".
         :param separators: An optional list of separator strings to use for splitting the text. The string
             separators will be treated as regular expressions unless the separator is "sentence", in that case the
             text will be split into sentences using a custom sentence tokenizer based on NLTK.