Add note

README.md

@@ -10,7 +10,10 @@ This Pterodactyl Egg allows you to set up and manage a Virtual Private Server wi
 
 - amd64
 - arm64
-- riscv64 (You have to provide/host your own rootfs images)
+- riscv64
+> [!NOTE]  
+> For `riscv64`, you must provide or host your own rootfs images. 
+> *(The only available image that supports `riscv64` here is Chimera Linux.)*
 
 ## Supported Operating Systems