fix(conda-forge): annotate for mypy strict

Author: imanimanyara

src/release_kit/platforms/registries/conda_forge.py

@@ -242,7 +242,7 @@ def _git(*args: str) -> str:
             except Exception:
                 existing = []
             if isinstance(existing, list) and existing:
-                first = existing[0]
+                first: object = existing[0]
                 if isinstance(first, dict):
                     url = str(first.get("html_url", ""))
                     return StepOutcome(