Update docs/language/learn-ql/writing-queries/debugging-queries.rst

Co-authored-by: Shati Patel <42641846+shati-patel@users.noreply.github.com>

Author: jf205

docs/language/learn-ql/writing-queries/debugging-queries.rst

@@ -148,7 +148,7 @@ However, as written it is difficult for the optimizer to pick out the best order
 
 Now the structure we want is clearer. We've separated out the easy part into its own predicate ``locInfo``, and the main predicate ``sameLoc`` is just a larger join.
 
-Further information
--------------------
+Further reading
+---------------
 
 .. include:: ../../reusables/codeql-ref-tools-further-reading.rst