Update bundled sources to 8.4.0 from 8.3.1. (#249)

waywardmonkeys · web-flow · commit 6339078daaa4 · 2024-04-05T08:36:57.000Z
diff --git a/harfbuzz-sys/harfbuzz b/harfbuzz-sys/harfbuzz
@@ -1 +1 @@
-Subproject commit 2b3631a866b3077d9d675caa4ec9010b342b5a7c
+Subproject commit 63973005bc07aba599b47fdd4cf788647b601ccd
