chore: added changeset file

Author: shubhamparikh2704

.changeset/wise-worlds-exist.md

@@ -0,0 +1,9 @@
+---
+'@mermaid-js/parser': patch
+---
+
+Add validation for negative values in pie charts:
+
+Prevents crashes during parsing by validating values post-parsing.
+
+Provides clearer, user-friendly error messages for invalid negative inputs.