fix: Update validation message (#315)

packages/shorebird_cli/lib/src/validators/shorebird_flutter_validator.dart

@@ -61,11 +61,11 @@ class ShorebirdFlutterValidator extends Validator {
     final pathFlutterVersion = await _pathFlutterVersion();
 
     if (shorebirdFlutterVersion != pathFlutterVersion) {
-      final message = """
-Shorebird Flutter and the Flutter on your path are different versions.
+      final message = '''
+The version of Flutter that Shorebird includes and the Flutter on your path are different.
 \tShorebird Flutter: $shorebirdFlutterVersion
 \tSystem Flutter:    $pathFlutterVersion
-This can cause unexpected behavior if the version gap is wide. If you're seeing this unexpectedly, please let us know on Shorebird discord!""";
+This can cause unexpected behavior if you are switching between the tools and the version gap is wide. If you have any trouble, please let us know on Shorebird discord.''';
 
       issues.add(
         ValidationIssue(

packages/shorebird_cli/test/src/validators/shorebird_flutter_validator_test.dart

@@ -167,8 +167,9 @@ Tools • Dart 2.19.6 • DevTools 2.20.1
         expect(results.first.severity, ValidationIssueSeverity.warning);
         expect(
           results.first.message,
-          contains('Shorebird Flutter and the Flutter on your path are'
-              ' different versions'),
+          contains(
+            'The version of Flutter that Shorebird includes and the Flutter on your path are different',
+          ),
         );
       },
     );