update bumpversion cfg.

Author: v0lta

.bumpversion.cfg

@@ -20,8 +20,8 @@ values =
 values = [0-9A-Za-z-]+
 
 [bumpversion:file:pyproject.toml]
-search = version = {current_version}
-replace = version = {new_version}
+search = version = "{current_version}"
+replace = version = "{new_version}"
 
 [bumpversion:file:src/ptwt/version.py]
 search = VERSION = "{current_version}"