ci: allow deps-dev scope for PR title (#430)

Well... Yup, I went too fast on the last one 🙊
- #429

Required by dependabot for:
- #424

Author: ccharly

.github/workflows/validate-pr-title.yml

@@ -40,7 +40,7 @@ jobs:
             test
           scopes: |
             deps
-            dev-deps
+            deps-dev
             keyring-api
             keyring-eth-hd
             keyring-eth-ledger-bridge