manifest: update oberon psa crypto revision

Manifest update check for oberon psa crypto

test_crypto: PR-726

Signed-off-by: Paul Fleury <[email protected]>

Author: PFnord

west.yml

@@ -143,7 +143,7 @@ manifest:
     - name: oberon-psa-crypto
       path: modules/crypto/oberon-psa-crypto
       repo-path: sdk-oberon-psa-crypto
-      revision: 21728cf8402ac567326d0d69eec891a2bfdb8ea3
+      revision: pull/18/head
     - name: nrfxlib
       repo-path: sdk-nrfxlib
       path: nrfxlib