build(deps): bump third_party/icestorm from `9594931` to `04f1eb7`
build(deps): bump third_party/icestorm from `9594931` to `04f1eb7`

Bumps [third_party/icestorm](https://github.com/cliffordwolf/icestorm) from `9594931` to `04f1eb7`.
- [Release notes](https://github.com/cliffordwolf/icestorm/releases)
- [Commits](https://github.com/cliffordwolf/icestorm/compare/95949315364f8d9b0c693386aefadf44b28e2cf6...04f1eb78ed8fd50516aee50102675041a8fd40cd)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
SymbiFlow/symbiflow-arch-defs,SymbiFlow/symbiflow-arch-defs