fix(ci): deployment pipeline for 'dev-follower-preview' network

Author: jpraynaud

.github/workflows/test-deploy-network.yml

@@ -77,10 +77,11 @@ jobs:
             mithril_p2p_signer_relay_signature_registration_mode: p2p
             mithril_api_domain: api.mithril.network
             mithril_era_reader_adapter_type: cardano-chain
-            mithril_protocol_parameters: {
-                k     = 5
-                m     = 100
-                phi_f = 0.65,
+            mithril_protocol_parameters: |
+              {
+                 k     = 5
+                 m     = 100
+                 phi_f = 0.65,
               }
             mithril_signers: |
               {