acknowledge DOMPurify / Cure53 / Mario Heiderich

README.md

@@ -105,3 +105,9 @@ Sigstore.
 - Security disclosures: [`SECURITY.md`](SECURITY.md) →
   `info@securelayer7.net`
 - General: [GitHub Issues](https://github.com/securelayer7/PROMPTPurify/issues)
+
+## Acknowledgments
+
+Name and design philosophy inspired by
+[DOMPurify](https://github.com/cure53/DOMPurify) by [Cure53](https://cure53.de).
+Thanks to **Mario Heiderich** for suggesting the name.