Replace broken arrow by ascii-art arrow

Author: cdboer

pyproject.toml

@@ -82,7 +82,7 @@ current_version = "2.2.0"
 commit = true
 tag = true
 tag_name = "{new_version}"
-message = "Bump version: {current_version} → {new_version}"
+message = "Bump version: {current_version} -> {new_version}"
 
 [[tool.bumpversion.files]]
 filename = "gitlab2prov/__init__.py"