Update readme shields

Remove broken shield and update with new

README.md

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 ![contributors](https://img.shields.io/github/contributors-anon/Superalgos/Superalgos?label=Contributors)
-![commit-activity](https://img.shields.io/github/commit-activity/y/Superalgos/Superalgos?label=Commit%20Activity)
+![pull-activity](https://img.shields.io/github/issues-pr-closed-raw/Superalgos/Superalgos?color=blueviolet)
+![last-commit](https://img.shields.io/github/last-commit/Superalgos/Superalgos/develop?label=last%20commit%20to%20develop)
 ![bot-friendliness](https://img.shields.io/badge/Bot%20Friendliness%20Level-119%25-yellow)
 
 Superalgos is not just another open-source project. We are an open and welcoming community devised, nurtured, and incentivized with the project's native <a href="https://superalgos.org/token-overview.shtml" target="_blank">Superalgos (SA) token</a> to grow into a massive trading collaboration. You will notice the difference as soon as you join the [Telegram Community Group](https://t.me/superalgoscommunity) or the new [Discord Server](https://discord.gg/CGeKC6WQQb).