docs: update README.md (leejet#23)

dmikey · web-flow · commit 76b9b2e9a2b1 · 2023-08-21T23:53:50.000+08:00
diff --git a/README.md b/README.md
@@ -49,6 +49,7 @@ cd stable-diffusion.cpp
 ```
 cd stable-diffusion.cpp
 git pull origin master
+git submodule init
 git submodule update
 ```
 
