SDL: (doc): make cmake build parallel on linux

SDL Commits
1 
From fdafa266d81a4bcd10e104f6e42eb4c8eae19d95 Mon Sep 17 00:00:00 2001
From: Benjamin Jurk <[EMAIL REDACTED]>
Date: Sat, 23 Nov 2024 09:34:00 +0100
Subject: [PATCH] (doc): make cmake build parallel on linux

---
 INSTALL.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/INSTALL.md b/INSTALL.md
index 647341d3b989f..b8b0afb2936de 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -26,7 +26,7 @@ Run: `cmake -S . -B build -DCMAKE_OSX_ARCHITECTURES="x86_64;arm64" && cmake --bu
 
 ## Linux and other UNIX systems:
 
-Run: `cmake -S . -B build && cmake --build build && cmake --install build`
+Run: `cmake -S . -B build && cmake --build build --parallel $(nproc) && cmake --install build`
 
 ## Android: