MavenProject object not initialize due to mispelling into the declaration

The quotes are missing in the expression initializing the MavenProject object in AnnouncementMailMojo.java
/**

• @parameter expression=$ {project}
  * @readonly
  */
  private MavenProject project;
  
  So far no impact as the project member was not called, but when trying to fix other issues a NullPointerExecption is raised.
  
  
  Patch:
  - * @parameter expression=${project}

  + * @parameter expression="$

  {project}

  "