Docs: normalise sqlite3 placeholder how-to heading (GH-96413)

(cherry picked from commit 7b01ce7953c0e24aa7aeaf207216fc9e7aefd18a)

Co-authored-by: Erlend E. Aasland <erlend.aasland@protonmail.com>
diff --git a/Doc/library/sqlite3.rst b/Doc/library/sqlite3.rst
index 21ad354..2c58ef7 100644
--- a/Doc/library/sqlite3.rst
+++ b/Doc/library/sqlite3.rst
@@ -1615,8 +1615,8 @@
 
 .. _sqlite3-placeholders:
 
-Using placeholders to bind values in SQL queries
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+How to use placeholders to bind values in SQL queries
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 SQL operations usually need to use values from Python variables. However,
 beware of using Python's string operations to assemble queries, as they