docs: character themes update

packages/pinball_theme/lib/src/themes/android_theme.dart

@@ -2,7 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:pinball_theme/pinball_theme.dart';
 
 /// {@template android_theme}
-/// Class defining Android theme assets and attributes.
+/// Defines Android theme assets and attributes.
 /// {@endtemplate}
 class AndroidTheme extends PinballTheme {
   /// {@macro android_theme}

packages/pinball_theme/lib/src/themes/dash_theme.dart

@@ -2,7 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:pinball_theme/pinball_theme.dart';
 
 /// {@template dash_theme}
-/// Class defining Dash theme assets and attributes.
+/// Defines Dash theme assets and attributes.
 /// {@endtemplate}
 class DashTheme extends PinballTheme {
   /// {@macro dash_theme}

packages/pinball_theme/lib/src/themes/dino_theme.dart

@@ -2,7 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:pinball_theme/pinball_theme.dart';
 
 /// {@template dino_theme}
-/// Class defining Dino theme assets and attributes.
+/// Defines Dino theme assets and attributes.
 /// {@endtemplate}
 class DinoTheme extends PinballTheme {
   /// {@macro dino_theme}

packages/pinball_theme/lib/src/themes/sparky_theme.dart

@@ -2,7 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:pinball_theme/pinball_theme.dart';
 
 /// {@template sparky_theme}
-/// Class defining Sparky theme assets and attributes.
+/// Defines Sparky theme assets and attributes.
 /// {@endtemplate}
 class SparkyTheme extends PinballTheme {
   /// {@macro sparky_theme}