Update peps/pep-0750.rst

Co-authored-by: Nice Zombies <[email protected]>

peps/pep-0750.rst

@@ -499,7 +499,7 @@ of the template and only reprocess the dynamic parts when the template is
 evaluated with different values. Access to the static parts can be done with
 ``template.args[::2]``.
 
-Interleaving is an invariant mainted by the ``Template`` class. Developers can
+Interleaving is an invariant maintained by the ``Template`` class. Developers can
 take advantage of it but they are not required to themselves maintain it.
 Specifically, ``Template.__init__()`` can be called with ``str`` and 
 ``Interpolation`` instances in *any* order; the constructor will "interleave" them