chore: add CHANGELOG entry for this PR

CHANGELOG.md

@@ -15,6 +15,7 @@
 output regressioin for PDF files.
 * **Fix a bug on Table partitioning** Previously the `skip_infer_table_types` variable used in partition was not being passed down to specific file partitioners. Now you can utilize the `skip_infer_table_types` list variable in partition to pass the filetype you want to exclude `text_as_html` metadata field for, or the `infer_table_structure` boolean variable on the file specific partitioning function.
 * **Fix partition docx without sections** Some docx files, like those from teams output, do not contain sections and it would produce no results because the code assumes all components are in sections. Now if no sections is detected from a document we iterate through the paragraphs and return contents found in the paragraphs.
+* **Fix unnecessary mid-text chunk-splitting.** The "pre-chunker" did not consider separator blank-line ("\n\n") length when grouping elements for a single chunk. As a result, sections were frequently over-populated producing a over-sized chunk that required mid-text splitting.
 
 ## 0.10.25