remove mention of pydantic in changelog

Signed-off-by: Ramon Petgrave <32398091+ramonpetgrave64@users.noreply.github.com>

Author: ramonpetgrave64

CHANGELOG.md

@@ -10,7 +10,7 @@ All versions prior to 0.9.0 are untracked.
 
 ### Fixed
 
-* Avoid pydantic's instantiation issues with `TransparencyLogEntry` when `InclusionPromise` is not present.
+* Avoid instantiation issues with `TransparencyLogEntry` when `InclusionPromise` is not present.
 
 * TSA: Changed the Timestamp Authority requests to explicitly use sha256 for message digests.
   [#1373](https://github.com/sigstore/sigstore-python/pull/1373)