Update installation.md

Author: rifsxd

docs/pages/installation.md

@@ -13,10 +13,18 @@ Copy, paste and run! Easy integration CLI commands
 curl -LSs "https://raw.githubusercontent.com/KernelSU-Next/KernelSU-Next/next/kernel/setup.sh" | bash -
 ```
 
-```sh [Next branch (dev)]
-curl -LSs "https://raw.githubusercontent.com/KernelSU-Next/KernelSU-Next/next/kernel/setup.sh" | bash -s next
+```sh [Dev branch]
+curl -LSs "https://raw.githubusercontent.com/KernelSU-Next/KernelSU-Next/next/kernel/setup.sh" | bash -s dev
+```
+
+```sh [Stable branch]
+curl -LSs "https://raw.githubusercontent.com/KernelSU-Next/KernelSU-Next/next/kernel/setup.sh" | bash -s stable
+```
+
+```sh [Legacy branch]
+curl -LSs "https://raw.githubusercontent.com/KernelSU-Next/KernelSU-Next/next/kernel/setup.sh" | bash -s legacy
 ```
 
 ```sh [Specific tag]
-curl -LSs "https://raw.githubusercontent.com/KernelSU-Next/KernelSU-Next/next/kernel/setup.sh" | bash -s v1.0.8
-```
+curl -LSs "https://raw.githubusercontent.com/KernelSU-Next/KernelSU-Next/next/kernel/setup.sh" | bash -s v3.0.0
+```