Update README.md

Author: Bonnarel

README.md

@@ -7,4 +7,4 @@ document template
   This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-sa/4.0/">
   Creative Commons Attribution-ShareAlike 4.0 International License</a>.
 
-[![PDF-Preview](https://img.shields.io/badge/Preview-PDF-blue)](../../releases/download/auto-pdf-preview/PulsarRadioDataAccess-draft.pdf)
+[![PDF-Preview](https://img.shields.io/badge/Preview-PDF-blue)](../../releases/download/untagged-5cf35d117af930233896/PulsarRadioDataAccess-draft.pdf)