update vendored flac

sezero · sezero · commit 2e6cfe68ba9b · 2025-09-09T22:06:04.000+03:00
diff --git a/external/flac b/external/flac
@@ -1 +1 @@
-Subproject commit b9b41b10b34d037fee6814c2c36373160bd67915
+Subproject commit bc9fab609b7ce849952099ecf3d7c2af750de0de
