fix bad property name

plugins/atem/main.js

@@ -6,7 +6,7 @@ exports.config = {
   defaultName: 'ATEM',
   connectionType: 'atem',
   defaultPort: 9910,
-  mayChangePort: false,
+  mayChangePorts: false,
   searchOptions: {
     type: 'UDPScan',
     searchBuffer: Buffer.from([

plugins/eos/main.js

@@ -7,7 +7,7 @@ exports.config = {
   defaultName: 'ETC Eos',
   connectionType: 'osc',
   defaultPort: 3037,
-  mayChangePort: true,
+  mayChangePorts: true,
   heartbeatInterval: 5000,
   heartbeatTimeout: 6000,
   searchOptions: {