Typo fix (#3625)

diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index f9c28ec..acb1862 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -6,7 +6,7 @@
 
 .. note:: This version is not yet released and is under active development.
 
-* **BACKWARDS INCOMPATIBLE:** Elliptic Curve signature verification no long
+* **BACKWARDS INCOMPATIBLE:** Elliptic Curve signature verification no longer
   returns ``True`` on success. This brings it in line with the interface's
   documentation, and our intent. The correct way to use
   :meth:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKey.verify`