Update CHANGES.rst

Remove the American English comma usage now we know the CI is fine!

Author: jsa34

CHANGES.rst

@@ -11,7 +11,7 @@ Unreleased
 - Use `gherkin-official` parser to replace custom parsing logic. This will make pytest-bdd more compatible with the Gherkin specification.
 - Multiline steps must now always use triple-quotes for the additional lines.
 - All feature files must now use the keyword `Feature:` to be considered valid.
-- Tags can no longer have spaces (e.g., "@tag one" and "@tag two" are no longer valid).
+- Tags can no longer have spaces (e.g. "@tag one" and "@tag two" are no longer valid).
 
 7.3.0
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