doc/deprecations: fix incorrect title level

bluetech · bluetech · commit 175ea47b2b97 · 2024-01-02T13:29:07.000+02:00
diff --git a/doc/en/deprecations.rst b/doc/en/deprecations.rst
@@ -136,7 +136,7 @@ conflicts (such as :class:`pytest.File` now taking ``path`` instead of
 deprecation warning is now raised.
 
 Applying a mark to a fixture function
--------------------------------------
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 .. deprecated:: 7.4
 
