[json-glib: 2/3] Update the README.md for build command example

[Emmanuele Bassi <ebassi src gnome org>]

commit 20cb41d88f1ddb71b90f6b0db7dbfc6709305bb7
Author: Frederic Martinsons <frederic martinsons sigfox com>
Date:   Sat Sep 10 08:41:28 2022 +0200

    Update the README.md for build command example
    
    Being explicit on setup args and add compile argument for building
    
    Signed-off-by: Frederic Martinsons <frederic martinsons sigfox com>

 README.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/README.md b/README.md
index 5ecf45f..2eb9044 100644
--- a/README.md
+++ b/README.md
@@ -42,8 +42,8 @@ Build and installation
 To build JSON-GLib just run:
 
 ```sh
-  $ meson _build .
-  $ meson -C _build
+  $ meson setup _build .
+  $ meson compile -C _build
   $ meson test -C _build
   $ meson install -C _build
 ```