fix typo in name of PlantUML
fix typo in name of PlantUML

asciidocfx/AsciidocFX,LightGuard/AsciidocFX,asciidocfx/AsciidocFX,gastaldi/AsciidocFX,jaredmorgs/AsciidocFX,lefou/AsciidocFX,lefou/AsciidocFX,asciidocfx/AsciidocFX,jaredmorgs/AsciidocFX,LightGuard/AsciidocFX,asciidocfx/AsciidocFX,jaredmorgs/AsciidocFX,LightGuard/AsciidocFX,gastaldi/AsciidocFX,gastaldi/AsciidocFX