Update README.md

Add gemini-intellij-plugin

README.md

@@ -262,6 +262,7 @@ Repo mirrors:
 - [gemini.sublime-syntax](https://github.com/adiabatic/gemini.sublime-syntax) - text/gemini syntax highlighting for bat (and maybe Sublime Text).
 - [gemini.yml](https://github.com/zyedidia/micro/blob/master/runtime/syntax/gemini.yaml) - text/gemini syntax highlighting for micro.
 - [language_gmi](https://github.com/lite-xl/lite-xl-plugins/blob/master/plugins/language_gmi.lua) - gemtext syntax highlighting for lite-xl
+- [gemini-intellij-plugin](https://github.com/michael-lazar/gemini-intellij-plugin/) - text/gemini syntax highlighting for IntelliJ IDEs 
 
 ## Web proxies
 - [Mozz.us portal](https://portal.mozz.us/gemini/gemini.circumlunar.space/)