Describe the StyleTTS2 relationship without quantifying the change

README.md

@@ -45,8 +45,8 @@ redistributed here** — obtain it from the upstream release. The frozen helper
 aligner, JDCNet pitch extractor, PL-BERT) likewise ship inside the upstream repository and are
 not redistributed.
 
-ChiReSSD's own modification to StyleTTS2 is two lines, published as patch files in the code
-repository rather than as a fork.
+ChiReSSD builds upon StyleTTS2, with its modifications published as patch files in the code
+repository.
 
 ## Intended use