Bump surf-disco from v0.4.6 to v0.4.7

Bumps [surf-disco](https://github.com/EspressoSystems/surf-disco) from v0.4.6 to v0.4.7.
- [Release notes](https://github.com/EspressoSystems/surf-disco/releases)
- [Commits](EspressoSystems/surf-disco@95181bc...070e18d)

---
updated-dependencies:
- dependency-name: surf-disco
  dependency-type: direct:production
...

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

Cargo.toml

@@ -83,7 +83,7 @@ jf-primitives = { git = "https://github.com/EspressoSystems/jellyfish", tag = "0
 prometheus = "0.13"
 serde = { version = "1.0", features = ["derive"] }
 snafu = { version = "0.7", features = ["backtraces"] }
-surf-disco = { git = "https://github.com/EspressoSystems/surf-disco.git", tag = "v0.4.6" }
+surf-disco = { git = "https://github.com/EspressoSystems/surf-disco.git", tag = "v0.4.7" }
 tide-disco = { git = "https://github.com/EspressoSystems/tide-disco.git", tag = "v0.4.6" }
 time = "0.3"
 toml = "0.8"