Try always using markup: markdown

[mattwthompson]

Similar to #499 but more straightforward

I'm not sure what markup: mark was ever meant to do but it's the cause of many cryptic errors associated with upgrading Hugo

[mattwthompson]

The action doesn't seem to host the build page, but locally I'm seeing it build without (build-time) error

$ hugo server -D                                                                                15:30:42  ☁  markup-markdown ☀
Watching for changes in /Users/mattthompson/software/openforcefield.org/{archetypes,content,data,static,themes}
Watching for config changes in /Users/mattthompson/software/openforcefield.org/config.toml
Start building sites …
hugo v0.140.2+extended+withdeploy darwin/amd64 BuildDate=2024-12-30T15:01:53Z VendorInfo=brew


                   | EN
-------------------+------
  Pages            | 607
  Paginator pages  |  64
  Non-page files   | 321
  Static files     |  38
  Processed images |   0
  Aliases          | 231
  Cleaned          |   0

Built in 14892 ms
Environment: "development"
Serving pages from disk
Running in Fast Render Mode. For full rebuilds on change: hugo server --disableFastRender
Web Server is available at http://localhost:1313/ (bind address 127.0.0.1)
Press Ctrl+C to stop

Though something's funky with the linebreaks?

[j-wags]

LGTM, thanks for digging into this @mattwthompson. The weird formatting for previous blog posts is worth it to get the build system more up to date. People writing new blog posts will get to see the weird layout in their local rendering and can figure out how to work around it.