fix: aux.ts reference in variable handler

Author: digitaldrummerj

src/variables/variable-handler.ts

@@ -2,7 +2,7 @@ import EventEmitter from 'events'
 import { ModuleLogger } from '../handlers/logger.js'
 import { ModelSpec } from '../models/types.js'
 import { getChannelVariables } from './channel.js'
-import { getAuxVariables } from './aux.js'
+import { getAuxVariables } from './auxiliary.js'
 import { getMatrixVariables } from './matrix.js'
 import { getBusVariables } from './bus.js'
 import { getMainVariables } from './main.js'