Remove unneeded, second cleancode() usage

Author: ArBridgeman

exasol/toolbox/util/release/changelog.py

@@ -51,7 +51,7 @@ def _create_versioned_changelog(self, unreleased_content: str) -> None:
             dependency_content = f"## Dependency Updates\n{dependency_changes}"
 
         template = cleandoc(f"{header}\n{unreleased_content}\n{dependency_content}")
-        self.versioned_changelog_md.write_text(cleandoc(template))
+        self.versioned_changelog_md.write_text(template)
 
     def _extract_unreleased_notes(self) -> str:
         """