fix(kotlin): void -> fun in ktor docs (#53)

Author: radstevee

docs/discord/kord.md

@@ -126,9 +126,9 @@ CommandScopeBuilderModifier.install(annotationParser)
 You may then use the annotation:
 
 ```kotlin
-@CommandScope(guilds = { 1337 })
+@CommandScope(guilds = [1337])
 @Command("command")
-public suspend void yourCommand() { /* ... */ }
+public suspend fun yourCommand() { /* ... */ }
 ```
 
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