manifest: Update sdk-zephyr with SPI test for error cases

Include changes from:
nrfconnect/sdk-zephyr#1637

Signed-off-by: Sebastian Głąb <sebastian.glab@nordicsemi.no>

west.yml

@@ -63,7 +63,7 @@ manifest:
     # https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/guides/modules.html
     - name: zephyr
       repo-path: sdk-zephyr
-      revision: c22c9c258ce776b88dac8a917ab13f46a4c7db85
+      revision: pull/1637/head
       import:
         # In addition to the zephyr repository itself, NCS also
         # imports the contents of zephyr/west.yml at the above