Update README.md

Author: dotsystemsdevs

README.md

@@ -144,3 +144,5 @@ If the API is rate-limited or unavailable, the badge falls back to `Reaper busy`
 MIT — see repository license file.
 
 Built by [Dot Systems](https://github.com/dotsystemsdevs).
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+[![Dead](https://commitmentissues.dev/api/badge/blueminder/flycast-netplay-savestates)](https://commitmentissues.dev/?repo=blueminder%2Fflycast-netplay-savestates)