Bump mithril from 2.0.3 to 2.0.4 in /server/webapp/WEB-INF/rails
Bump mithril from 2.0.3 to 2.0.4 in /server/webapp/WEB-INF/rails

Bumps [mithril](https://github.com/MithrilJS/mithril.js) from 2.0.3 to 2.0.4.
- [Release notes](https://github.com/MithrilJS/mithril.js/releases)
- [Commits](https://github.com/MithrilJS/mithril.js/compare/v2.0.3...v2.0.4)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>

ibnc/gocd,Skarlso/gocd,gocd/gocd,ketan/gocd,ibnc/gocd,GaneshSPatil/gocd,marques-work/gocd,kierarad/gocd,bdpiparva/gocd,arvindsv/gocd,marques-work/gocd,Skarlso/gocd,ibnc/gocd,bdpiparva/gocd,arvindsv/gocd,Skarlso/gocd,arvindsv/gocd,ibnc/gocd,ketan/gocd,bdpiparva/gocd,ketan/gocd,kierarad/gocd,ibnc/gocd,gocd/gocd,marques-work/gocd,ketan/gocd,gocd/gocd,ibnc/gocd,ketan/gocd,GaneshSPatil/gocd,marques-work/gocd,gocd/gocd,GaneshSPatil/gocd,GaneshSPatil/gocd,gocd/gocd,bdpiparva/gocd,marques-work/gocd,kierarad/gocd,Skarlso/gocd,arvindsv/gocd,Skarlso/gocd,ketan/gocd,bdpiparva/gocd,marques-work/gocd,arvindsv/gocd,Skarlso/gocd,arvindsv/gocd,kierarad/gocd,kierarad/gocd,gocd/gocd,kierarad/gocd,bdpiparva/gocd,GaneshSPatil/gocd,GaneshSPatil/gocd