Add back openSSF scorecard (#1317)

README.md

@@ -4,6 +4,7 @@
 [![Get Yomitan for Firefox](<https://img.shields.io/amo/v/yomitan?logo=Firefox&style=for-the-badge&color=orange&label=get%20yomitan%20for%20firefox%20(stable)>)](https://addons.mozilla.org/en-US/firefox/addon/yomitan/)
 [![Get Yomitan for Edge](https://img.shields.io/badge/dynamic/json?logo=puzzle&label=get%20yomitan%20for%20edge&style=for-the-badge&query=%24.version&url=https%3A%2F%2Fmicrosoftedge.microsoft.com%2Faddons%2Fgetproductdetailsbycrxid%2Fidelnfbbmikgfiejhgmddlbkfgiifnnn)](https://microsoftedge.microsoft.com/addons/detail/yomitan/idelnfbbmikgfiejhgmddlbkfgiifnnn)
 [![Discord](https://dcbadge.vercel.app/api/server/UGNPMDE7zC)](https://discord.gg/UGNPMDE7zC)
+[![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/themoeway/yomitan/badge)](https://securityscorecards.dev/viewer/?uri=github.com/themoeway/yomitan)
 
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