Record the committed Korean README source baseline

The README source and its Korean localization are now committed, so replace
the temporary null source baseline with the exact source commit.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Author: justinyoo

localizations/ko-kr/.localization-state.json

@@ -32,7 +32,7 @@
       "localized_sha256": "c1742e808e67286455db8b19814f1aca1ac4054d2c2cf03f0da436f916f46506"
     },
     "README.md": {
-      "source_commit": null,
+      "source_commit": "dbc62263b7baa8f8c9bbe3504dbdfb5b32834ff0",
       "source_sha256": "b043ff40516cfd249bc29cdf8e2eef34b80fd7fb85aecf966a19ca75c89e1eca",
       "localized_sha256": "fdf018582a917a8edf02016335294ca948a01401c27b2f606698f65feb1d6c8f"
     },