Use sentence case in section title

treyhunner · AA-Turner · web-flow · commit a6b5c0d6c82a · 2024-08-10T14:39:31.000-07:00
Co-authored-by: Adam Turner &lt;9087854+AA-Turner@users.noreply.github.com&gt;
diff --git a/Doc/library/json.rst b/Doc/library/json.rst
@@ -680,7 +680,7 @@ when serializing instances of "exotic" numerical types such as
 .. _json-commandline:
 .. program:: json
 
-Command-Line Interface
+Command-line interface
 ----------------------
 
 **Source code:** :source:`Lib/json/tool.py`
