Bump mods/mtg/flowers from 500d5a2 to 6ca5052

Bumps [mods/mtg/flowers](https://github.com/minetest-game/flowers) from `500d5a2` to `6ca5052`.
- [Commits](minetest-game/flowers@500d5a2...6ca5052)

---
updated-dependencies:
- dependency-name: mods/mtg/flowers
  dependency-type: direct:production
...

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