WASM Playground config: use --debug

Added, but will not work until Flutter 3.27.0 is released.

Author: rydmike

.run/Example5 WASM - Playground.run.xml

@@ -1,6 +1,6 @@
 <component name="ProjectRunConfigurationManager">
  <configuration default="false" name="Example5 WASM - Playground" type="FlutterRunConfigurationType" factoryName="Flutter">
- <option name="additionalArgs" value="--wasm --release" />
+ <option name="additionalArgs" value="--wasm --debug" />
  <option name="filePath" value="$PROJECT_DIR$/example/lib/example5_themes_playground/main.dart" />
  <method v="2" />
  </configuration>