Bump vendor/assets/stylesheets/bulma from f1d23c1 to 3b63997

Bumps [vendor/assets/stylesheets/bulma](https://github.com/jgthms/bulma) from `f1d23c1` to `3b63997`.
- [Release notes](https://github.com/jgthms/bulma/releases)
- [Commits](jgthms/bulma@f1d23c1...3b63997)

---
updated-dependencies:
- dependency-name: vendor/assets/stylesheets/bulma
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>