add microoptimizations

docs/1.8.9/modlist.md

@@ -11,6 +11,7 @@ To install Forge for 1.8.9, please read the [guides for installing Modrinth or P
 | Mod | Description | Author | Notes |
 | --- | --- | --- | --- |
 | [Ksyxis](https://modrinth.com/mod/ksyxis) | Reduces world loading times. | [VidTu](https://github.com/VidTu) | This mod only works in single player and will disable spawn chunks entirely. |
+| [MicroOptimizations](https://modrinth.com/mod/microoptimizations) | Caching and block pos pooling optimizations ported from Feather Client's open source optimization mod. | [Microcontrollers](https://github.com/MicrocontrollersDev) |
 | [OptiFine](https://optifine.net/download?f=preview_OptiFine_1.8.9_HD_U_M6_pre2.jar) | One of the oldest performance mods for Minecraft. Required for many resource packs as well. | [sp614x](https://github.com/sp614x) | This is a direct download that skips OptiFine's ads. |
 | [PolyPatcher](https://modrinth.com/mod/patcher) | Patcher fixes several Minecraft bugs, adds many performance improvements, and adds many quality of life features. | [Sk1erLLC](https://github.com/Sk1erLLC) & [Polyfrost](https://github.com/Polyfrost) | This is a fork of the original Patcher mod by Sk1er. It removes one-off features that have been improved in other mods, adds a few more QOL changes, and has several new bug fixes, crash fixes, and performance enhancements. |
 | [QuickQuit](https://modrinth.com/mod/quickquit) | Allows closing Minecraft during the Forge resource loading screen when starting the game. | [Microcontrollers](https://github.com/MicrocontrollersDev) |