Example `diagram-mermaid-with-filter-diagram` not rendered correctly

[Wandmalfarbe]

The filter diagram does not generate a mermaid diagram but displays an error instead:

building 'diagram-mermaid-with-filter-diagram'
    - running pandoc build script
Warning: [WARNING] Scripting warning at /home/runner/.local/share/pandoc/filters/diagram.lua line 603 column 1: /home/runner/.local/share/pandoc/filters/diagram.lua: mmdc: createProcess: posix_spawnp: does not exist (No such file or directory)
Warning: [WARNING] Scripting warning at /home/runner/.local/share/pandoc/filters/diagram.lua line 603 column 1: /home/runner/.local/share/pandoc/filters/diagram.lua: mmdc: createProcess: posix_spawnp: does not exist (No such file or directory)
    - generating preview

https://github.com/Wandmalfarbe/pandoc-latex-template/actions/runs/21565347710/job/62135837086#step:13:48