Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: markuswondrak

src/specify_cli/workflows/overlays/layer_sources.py

@@ -98,7 +98,9 @@ def collect(self, workflow_id: str) -> list[Layer]:
                 raise OverlayLoadError(path, ["Symlinked overlay files are not allowed"])
             try:
                 data = yaml.safe_load(path.read_text(encoding="utf-8")) or {}
-            except (yaml.YAMLError, OSError, UnicodeDecodeError) as exc:
+            except yaml.YAMLError as exc:
+                raise OverlayLoadError(path, [f"Invalid YAML: {exc}"]) from exc
+            except (OSError, UnicodeDecodeError) as exc:
                 raise OverlayLoadError(path, [f"Cannot load overlay: {exc}"]) from exc
             overlay, errors = validate_overlay_yaml(data)
             if overlay is None or errors: