Update ReST whitespace

Author: encukou

Doc/whatsnew/3.15.rst

@@ -824,11 +824,12 @@ mimetypes
 * Add ``application/toml``. (Contributed by Gil Forcada in :gh:`139959`.)
 * Add ``image/jxl``. (Contributed by Foolbar in :gh:`144213`.)
 * Add the following MIME types:
-   - ``application/vnd.ms-cab-compressed`` for ``.cab`` extension
-   - ``application/vnd.ms-htmlhelp`` for ``.chm`` extension
-   - ``application/vnd.ms-officetheme`` for ``.thmx`` extension
 
-(Contributed by Charlie Lin in :gh:`145718`.)
+  - ``application/vnd.ms-cab-compressed`` for ``.cab`` extension
+  - ``application/vnd.ms-htmlhelp`` for ``.chm`` extension
+  - ``application/vnd.ms-officetheme`` for ``.thmx`` extension
+
+  (Contributed by Charlie Lin in :gh:`145718`.)
 
 * Rename ``application/x-texinfo`` to ``application/texinfo``.
   (Contributed by Charlie Lin in :gh:`140165`.)