Added missing comma.

Author: afourney

src/markitdown/_markitdown.py

@@ -1500,7 +1500,8 @@ def __init__(
                         "/opt",
                         "/opt/bin",
                         "/opt/local/bin",
-                        "/opt/homebrew/bin" "C:\\Windows\\System32",
+                        "/opt/homebrew/bin",
+                        "C:\\Windows\\System32",
                         "C:\\Program Files",
                         "C:\\Program Files (x86)",
                     ]