manifest: use Zephyr main branch

gmarull · carlescufi · commit af6b7128e5cd · 2021-05-20T17:38:06.000+02:00
Zephyr now uses main instead of master.

Signed-off-by: Gerard Marull-Paretas &lt;gerard.marull@nordicsemi.no&gt;
diff --git a/west.yml b/west.yml
@@ -12,5 +12,5 @@ manifest:
   projects:
     - name: zephyr
       remote: zephyrproject-rtos
-      revision: master
+      revision: main
       import: true
