Update options.md - Added 'Astounding' Project

docs/options.md

@@ -256,3 +256,7 @@ with info about your project (name and website) so we can add an entry for you.
 1. ScalaPB Validate
    * Website: https://scalapb.github.io/docs/validation
    * Extension: 1089
+   
+1. Astounding (Currently Private)
+   * Website: https://github.com/PbPipes/Astounding 
+   * Extension: 1090