Python: Use American English in change note

tausbn · intrigus-lgtm · web-flow · commit a404faa302b6 · 2021-04-13T15:05:44.000+02:00
Co-authored-by: intrigus-lgtm &lt;60750685+intrigus-lgtm@users.noreply.github.com&gt;
diff --git a/python/change-notes/2021-04-13-pep249-api-graphs.md b/python/change-notes/2021-04-13-pep249-api-graphs.md
@@ -1,4 +1,4 @@
 lgtm,codescanning
-* Modelling of libraries supporting PEP249 has been changed to use API graphs. When defining new
+* Modeling of libraries supporting PEP249 has been changed to use API graphs. When defining new
   models, the relevant extension point is now `PEP249ModuleApiNode` in the `PEP249` module, instead
   of `PEP249Module`. The latter class has now been deprecated.
