docs: add prettier-plugin-properties to community plugins (#7994)

Co-authored-by: fisker Cheung <lionkay@gmail.com>

docs/plugins.md

@@ -52,6 +52,7 @@ Providing at least one path to `--plugin-search-dir`/`pluginSearchDirs` turns of
 - [`prettier-plugin-package`](https://github.com/shellscape/prettier-plugin-package) by [**@shellscape**](https://github.com/shellscape)
 - [`prettier-plugin-packagejson`](https://github.com/matzkoh/prettier-plugin-packagejson) by [**@matzkoh**](https://github.com/matzkoh)
 - [`prettier-plugin-pg`](https://github.com/benjie/prettier-plugin-pg) by [**@benjie**](https://github.com/benjie)
+- [`prettier-plugin-properties`](https://github.com/eemeli/prettier-plugin-properties) by [**@eemeli**](https://github.com/eemeli)
 - [`prettier-plugin-solidity`](https://github.com/prettier-solidity/prettier-plugin-solidity) by [**@mattiaerre**](https://github.com/mattiaerre)
 - [`prettier-plugin-svelte`](https://github.com/UnwrittenFun/prettier-plugin-svelte) by [**@UnwrittenFun**](https://github.com/UnwrittenFun)
 - [`prettier-plugin-toml`](https://github.com/bd82/toml-tools/tree/master/packages/prettier-plugin-toml) by [**@bd82**](https://github.com/bd82)