Minor edit to whatsnew

Author: echedey-ls

docs/sphinx/source/whatsnew/v0.15.3.rst

@@ -38,7 +38,7 @@ Requirements
 
 Maintenance
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-* Fix some gallery examples not being run. Now, gallery example whose filename begins with ``NX_`` will be exclusively excluded. (:issue:`2790`, :pull:`2792`)
+* Fix some gallery examples not being run. Only gallery examples whose filename begins with ``NX_`` will be excluded. (:issue:`2790`, :pull:`2792`)
 
 Contributors
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