Update ToHtmlSerializer.java
Update ToHtmlSerializer.java

fixed printImageTag of end tag use wrong html symbols.

vsch/pegdown,Kevin-Lee/pegdown,sirthias/pegdown,martinklepsch/pegdown,Kevin-Lee/pegdown,martinklepsch/pegdown,Moosemorals/pegdown,Deraen/pegdown,vsch/pegdown,sirthias/pegdown,Deraen/pegdown,leonac/pegdown,Moosemorals/pegdown,leonac/pegdown