Update peps/pep-0815.rst

Co-authored-by: Adam Turner <[email protected]>

Author: konstin

peps/pep-0815.rst

@@ -48,8 +48,8 @@ updated to reflect this. Build backends and other tools must not add these
 files to wheels. Installers must not attempt to verify them, while they
 remain excluded from ``RECORD``.
 
-Backward Compatibility
-======================
+Backwards Compatibility
+=======================
 
 Known implementations require no changes, as they do not support these files
 beyond skipping them when processing the ``RECORD`` file. Users should refer