manifest: update hal_nordic with default CLKSEL for GRTC

Signed-off-by: Adam Kondraciuk <[email protected]>

Author: adamkondraciuk

west.yml

@@ -193,7 +193,7 @@ manifest:
       groups:
         - hal
     - name: hal_nordic
-      revision: ecea8cdbd1a7d557563b47ad304ee9ba7a8709e5
+      revision: pull/278/head
       path: modules/hal/nordic
       groups:
         - hal