Update black to v23.9.0

renovate[bot] · web-flow · commit fef1ac40456c · 2023-09-09T04:09:34.000Z
| datasource | package | from   | to     |
| ---------- | ------- | ------ | ------ |
| pypi       | black   | 23.3.0 | 23.9.0 |
diff --git a/requirements.txt b/requirements.txt
@@ -2,4 +2,4 @@ draftjs_exporter==5.0.0
 draftjs_exporter_markdown==0.2.4
 beautifulsoup4==4.12.2
 html5lib==1.1
-black==23.3.0
+black==23.9.0
