try to fix uml

.github/workflows/ghpages.yaml

@@ -1,26 +1,21 @@
 name: GitHub Pages Publish
 
-# Controls when the action will run. Triggers the workflow on push or pull request
-# events but only for the master branch
 on:
   push:
     branches: [ master, main ]
   pull_request:
     branches: [ master, main ]
 
-# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+env:
+  PLANTUML_URL: https://plantuml.collaud.me
+
 jobs:
-  # This workflow contains a single job called "build"
   build:
-    # The type of runner that the job will run on
     runs-on: ubuntu-latest
 
-    # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
-      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
       - uses: actions/checkout@v4
 
-      # Includes the AsciiDoctor GitHub Pages Action to convert adoc files to html and publish to gh-pages branch
       - name: asciidoctor-ghpages
         uses: manoelcampos/asciidoctor-ghpages-action@v2
         with: