docs: update installation.mdx to include system requirements

docs/modules/usage/installation.mdx

@@ -6,11 +6,7 @@
 - Linux
 - Windows with [WSL](https://learn.microsoft.com/en-us/windows/wsl/install) and [Docker Desktop support](https://docs.docker.com/desktop/setup/install/windows-install/#system-requirements)
 
-System should meet the following minimum computing and storage requirements to run OpenHands locally:
-
-- **CPU**: Any modern dual-core processor (Uses ~0.29% CPU)
-- **RAM**: Minimum 1GB RAM (Uses ~335MB RAM)
-- **Disk Space**: At least 1GB free space (Uses ~654MB)
+A system with a modern processor and a minimum of **4GB RAM** is recommended to run OpenHands.
 
 ## Prerequisites