hanle existing release update symlinks without triggering a SecurityViolation

Author: gronke

libioc/ResourceUpdater.py

@@ -700,7 +700,9 @@ def _post_fetch(self) -> None:
     def _pre_update(self) -> None:
         """Execute before executing the update command."""
         lnk = f"{self.resource.root_path}{self._base_release_symlink_location}"
-        self.resource._require_relative_path(lnk)
+        self.resource._require_relative_path(f"{lnk}/..")
+        if os.path.islink(lnk) is True:
+            os.unlink(lnk)
         os.symlink("/", lnk)
 
     def _post_update(self) -> None: