docs: Spell check fixes (#24217)

**Description:** Spell check fixes for docs, comments, and a couple of
strings. No code change e.g. variable names.
**Issue:** none
**Dependencies:** none
**Twitter handle:** hmartin

libs/text-splitters/langchain_text_splitters/character.py

@@ -345,7 +345,7 @@ class RecursiveCharacterTextSplitter(TextSplitter):
             ]
         elif language == Language.ELIXIR:
             return [
-                # Split along method function and module definiton
+                # Split along method function and module definition
                 "\ndef ",
                 "\ndefp ",
                 "\ndefmodule ",