Bump gui from 7d4530f to 6d9ad24 (#301)

Bumps [gui](https://github.com/openevse/openevse_wifi_gui) from `7d4530f` to `6d9ad24`.
- [Release notes](https://github.com/openevse/openevse_wifi_gui/releases)
- [Commits](OpenEVSE/openevse_wifi_gui@7d4530f...6d9ad24)

---
updated-dependencies:
- dependency-name: gui
  dependency-type: direct:production
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]