Clarify which sounds can be played with speaker

Closes #2327

projects/common/src/main/java/dan200/computercraft/shared/peripheral/speaker/SpeakerPeripheral.java

@@ -45,7 +45,7 @@ import static dan200.computercraft.api.lua.LuaValues.checkFinite;
  * <p>
  * The speaker can play three kinds of sound, in increasing orders of complexity:
  * - {@link #playNote} allows you to play noteblock note.
- * - {@link #playSound} plays any built-in Minecraft sound, such as block sounds or mob noises.
+ * - {@link #playSound} plays any Minecraft sound, such as block sounds or mob noises.
  * - {@link #playAudio} can play arbitrary audio.
  * <p>
  * ## Recipe
@@ -229,7 +229,7 @@ public abstract class SpeakerPeripheral implements IPeripheral {
     /**
      * Plays a Minecraft sound through the speaker.
      * <p>
-     * This takes the [name of a Minecraft sound](https://minecraft.wiki/w/Sounds.json), such as
+     * This takes the name of a [vanilla Minecraft](https://minecraft.wiki/w/Sounds.json) or modded sound, such as
      * {@code "minecraft:block.note_block.harp"}, as well as an optional volume and pitch.
      * <p>
      * Only one sound can be played at once. This function will return {@literal false} if another sound was started