no need for encoding arg

Co-authored-by: Hugo van Kemenade <[email protected]>

Author: AA-Turner

release.py

@@ -448,7 +448,7 @@ def tweak_readme(tag: Tag, filename: str = "README.rst") -> None:
 
     # Update first line: "This is Python version X.Y.Z {release_level} N"
     # and update length of underline in second line to match.
-    lines = readme.read_text(encoding="utf-8").split("\n")
+    lines = readme.read_text().split("\n")
     this_is = f"This is Python version {tag.long_name}"
     underline = "=" * len(this_is)
     lines[0] = this_is