Add maxAlternatives type

client/src/types/speech.d.ts

@@ -7,6 +7,7 @@ interface SpeechRecognition extends EventTarget {
   continuous: boolean
   interimResults: boolean
   lang: string
+  maxAlternatives: number
   onresult: ((event: SpeechRecognitionEvent) => void) | null
   onerror: ((event: Event) => void) | null
   onend: (() => void) | null