Update extensions repo

README.md

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+### Please give the repo a :star:
+
+| Build | Support Server |
+|-------|---------|
+| [![CI](https://github.com/keiyoushi/extensions-source/actions/workflows/build_push.yml/badge.svg)](https://github.com/keiyoushi/extensions-source/actions/workflows/build_push.yml) | [![Discord](https://img.shields.io/discord/1193460528052453448.svg?label=discord&labelColor=7289da&color=2c2f33&style=flat)](https://discord.gg/3FbCpdKbdY) |
+
+## Source Code
+
+https://github.com/keiyoushi/extensions-source
+
+## Report issues
+
+https://github.com/keiyoushi/extensions-source/issues/new/choose
+
+## Guide
+
+[Getting started](https://keiyoushi.github.io/docs/guides/getting-started#adding-the-extension-repo)
+
+# Others
+If you're not using any of the above fork then manually download and update extensions from [the listing page](https://keiyoushi.github.io/extensions/)