🔧 Update the installation of plantuml

* Update sphinx config
* Update github action

Author: veit

.github/workflows/ci.yml

@@ -26,6 +26,9 @@ jobs:
       with:
         # Keep in sync with .readthedocs.yaml
         python-version-file: .python-version
+    - name: Install plantuml
+      run: |
+        sudo apt install plantuml
     - name: Setup cached uv
       uses: hynek/setup-cached-uv@v2
     - name: Create venv and install docs dependencies

docs/conf.py

@@ -50,7 +50,7 @@
     "sphinx_inline_tabs",
 ]
 
-plantuml = "/usr/bin/plantuml"
+plantuml = "plantuml"
 plantuml_output_format = "svg"
 
 intersphinx_mapping = {