refactor: this can also be final

src/main/java/emu/grasscutter/command/commands/SetPropCommand.java

@@ -291,9 +291,9 @@ public final class SetPropCommand implements CommandHandler {
     }
 
     static class Prop {
-        String name;
-        PlayerProperty prop;
-        PseudoProp pseudoProp;
+        final String name;
+        final PlayerProperty prop;
+        final PseudoProp pseudoProp;
 
         public Prop(PlayerProperty prop) {
             this(prop.toString(), prop, PseudoProp.NONE);

src/main/java/emu/grasscutter/command/commands/SetStatsCommand.java

@@ -171,8 +171,8 @@ public final class SetStatsCommand implements CommandHandler {
     }
 
     private static class Stat {
-        String name;
-        FightProperty prop;
+        final String name;
+        final FightProperty prop;
 
         public Stat(FightProperty prop) {
             this.name = prop.toString();