README: fix compile instructions

Signed-off-by: Tomi Valkeinen <[email protected]>

README.md

@@ -21,16 +21,8 @@ Also included are some simple utilities for KMS and python bindings for kms++.
 
 ## Build instructions:
 
-To build the Python bindings you need to set up the git-submodule for pybind11:
-
-```
-git submodule update --init
-```
-
-And to compile:
-
 ```
-meson build
+meson setup build
 ninja -C build
 ```