Add shields.io badges for output documents

Author: orviz

README.md

@@ -1,6 +1,8 @@
 # A set of Common Service Quality Assurance Baseline Criteria for Research Projects
 
-<!-- usage note: edit the H1 title above to personalize the manuscript -->
+[![HTML Manuscript](https://img.shields.io/badge/manuscript-HTML-blue.svg)](https://EOSC-synergy.github.io/service-qa-baseline/)
+[![PDF Manuscript](https://img.shields.io/badge/manuscript-PDF-blue.svg)](https://EOSC-synergy.github.io/service-qa-baseline/manuscript.pdf)
+[![GitHub Actions Status](https://github.com/EOSC-synergy/service-qa-baseline/workflows/Manubot/badge.svg)](https://github.com/EOSC-synergy/service-qa-baseline/actions)
 
 ## Motivation