Bump libs/imgui from 9937660 to 8be0723

Bumps [libs/imgui](https://github.com/ocornut/imgui) from `9937660` to `8be0723`.
- [Release notes](https://github.com/ocornut/imgui/releases)
- [Commits](ocornut/imgui@9937660...8be0723)

---
updated-dependencies:
- dependency-name: libs/imgui
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>