Update peps/pep-0750.rst

Commit Barry’s suggestion

Co-authored-by: Barry Warsaw <barry@python.org>

Author: davepeck

peps/pep-0750.rst

@@ -413,7 +413,7 @@ Implicit concatenation of two template string literals is also supported:
     assert (t"Hello " t"{name}").strings == ("Hello ", "")
     assert (t"Hello " t"{name}").values[0] == "World"
 
-Both implicit and explicit concatenation between ``Template`` and ``str`` is
+Both implicit and explicit concatenation of ``Template`` and ``str`` is
 prohibited. This is because it is ambiguous whether the ``str`` should be
 treated as a static string part or as an interpolation.