Update tools/package.json dependencies, remove imagemin-zopfli (#35406)
imagemin-zopfli brings a lot of [vulnerable dependencies](https://github.com/go-gitea/gitea/security/dependabot) and it is unmaintained. The removal brings a size increase to these images, but I think ultimately this size does not matter enough. I verified this passes `pnpm audit` now.
Before Width: | Height: | Size: 3.1 KiB After Width: | Height: | Size: 6.6 KiB |
Before Width: | Height: | Size: 4.8 KiB After Width: | Height: | Size: 7.5 KiB |
Before Width: | Height: | Size: 4.2 KiB After Width: | Height: | Size: 6.8 KiB |
Before Width: | Height: | Size: 14 KiB After Width: | Height: | Size: 21 KiB |