libbacktrace: bump (#7791)

arnetheduck · web-flow · commit 97d5f044dd92 · 2025-12-12T01:09:56.000Z
* fix memory leak in stack collector
* nicer demangled stack traces
diff --git a/vendor/nim-libbacktrace b/vendor/nim-libbacktrace
@@ -1 +1 @@
-Subproject commit 267dee621ecc33883c9fad1b4af0d296cde7d822
+Subproject commit 99bc2ba16bc2d44f9a97e706304f64744d913d7f
