doc(issuer): correct documentation on how to create an unsigned reque…

…st for a genericissuer

client/v1/issuer/README.md

@@ -4,6 +4,7 @@ In order to create a unisgned request to send to a sandbox.genericissuer admin d
 1. `echo '{"controller": "<did doc desciption>"}' > controller.json`
 2. `zenroom -a controller.json -z create-keyring.zen > keys.json`
 3. `zenroom -a keys.json -z create-identity-pubkeys.zen > pks.json`
-4. `zenroom -a pks.json -k request_input.json -z pubkeys-request-unsigned.zen > req.json`
+4. `jq '."did_spec"= "sandox.genericissuer"' did-settings.json > request_input.json`
+5. `zenroom -a pks.json -k request_input.json -z pubkeys-request-unsigned.zen > req.json`