chore(deps): bump alloy-signer from 0.8.3 to 0.15.11

Bumps [alloy-signer](https://github.com/alloy-rs/alloy) from 0.8.3 to 0.15.11.
- [Release notes](https://github.com/alloy-rs/alloy/releases)
- [Changelog](https://github.com/alloy-rs/alloy/blob/main/CHANGELOG.md)
- [Commits](alloy-rs/alloy@v0.8.3...v0.15.11)

---
updated-dependencies:
- dependency-name: alloy-signer
  dependency-version: 0.15.11
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -8,7 +8,7 @@ rust-version.workspace = true
 alloy-consensus = "0.8"
 alloy-network = "0.8"
 alloy-primitives = "0.8"
-alloy-signer = "0.8"
+alloy-signer = "0.15"
 alloy-signer-local = "0.8"
 async-trait = "0.1"
 hex = "0.4"

crates/solver-account/Cargo.toml

@@ -10,7 +10,7 @@ alloy-network = "0.8"
 alloy-primitives = "0.8"
 alloy-provider = "0.8"
 alloy-rpc-types = "0.8"
-alloy-signer = "0.8"
+alloy-signer = "0.15"
 alloy-signer-local = "0.8"
 alloy-sol-types = "0.8"
 alloy-transport = "0.8"