manifest: Use tag and not hash for Oberon PSA core

Use a tag instead of a hash to point to the Oberon PSA
core.

This is preparation work, when the Oberon PSA core is updated
the history will be rewritten so the current commit hash needs
to be preserved.

Signed-off-by: Georgios Vasilakis <[email protected]>

Author: Vge0rge

Diff for: west.yml

@@ -141,7 +141,7 @@ manifest:
     - name: oberon-psa-crypto
       path: modules/crypto/oberon-psa-crypto
       repo-path: sdk-oberon-psa-crypto
-      revision: d66c20787f82b9469439fb7c1436463c02ca3b10
+      revision: v1.3.0-ncs1-snapshot1
     - name: nrfxlib
       repo-path: sdk-nrfxlib
       path: nrfxlib