Converting spoiler tags to HTML instead of markdown, so more markdown converters…

Converting spoiler tags to HTML instead of markdown, so more markdown converters will support it (i.e. CurseForge, Modrinth, and GitLab)
4 jobs from fixing-readme-markdown in 1 minute 58 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #39305
minecraft
build_mod

01:58

 
  Test
manual #39306
minecraft allowed to fail manual
gpt-3.5-turbo
manual #39307
minecraft allowed to fail manual
gpt-4o
manual #39308
minecraft allowed to fail manual
llama3-8b