doc: mention build helper script for muon build instruction

The CI build steps are using the helper build.sh script. So instead
pointing to the workflow to see how this can be done, point to the build
script.

Signed-off-by: Daniel Wagner <[email protected]>

Author: dwsuse

README.md

@@ -79,7 +79,13 @@ there are two project which implement the Ninja and the Meson API in pure C99
   - samurai: https://github.com/michaelforney/samurai.git
   - muon: https://git.sr.ht/~lattis/muon
 
-See the CI [build](.github/workflows/build.yml) for an example how to use it.
+The CI build helper script `scripts/build.sh` is able to setup and build this
+project in a minimal setup using samurai and muon and thus only depending on:
+- gcc
+- make
+- git
+
+`scripts/build.sh -m muon`
 
 ## To compile libnvme