deprecate encode_point and migrate all internal callers (#4720)

diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 88e2aaf..d77cf15 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -50,7 +50,8 @@
   :meth:`~cryptography.hazmat.primitives.asymmetric.x25519.X25519PublicKey.public_bytes`
   with no arguments has been deprecated.
 * Added support for encoding compressed and uncompressed points via
-  :meth:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKey.public_bytes`.
+  :meth:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKey.public_bytes`. Deprecated the previous method
+  :meth:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicNumbers.encode_point`.
 
 
 .. _v2-4-2: