ci: skip jfrog login on macos

Author: couto

.github/workflows/build-desktop-reusable.yml

@@ -67,6 +67,7 @@ jobs:
 
       - name: Login to JFrog Ledger
         id: jfrog-login
+        if: ${{ vars.ARTIFACTORY_URL != '' && matrix.output-name != 'mac' }}
         uses: LedgerHQ/actions-security/actions/jfrog-login@actions/jfrog-login-1.4.0
 
       - name: Configure npmrc