Fix testing section in readme

Gigitsu · Gigitsu · commit 129961bdaeb6 · 2025-11-01T14:21:42.000+01:00
diff --git a/README.md b/README.md
@@ -149,7 +149,7 @@ def deps do
 end
 ```
 
-Use the builtin Mox behaviour:
+Use the builtin Mox strategy:
 
 ```elixir
 # config/test.exs
