bump alloy to version 0.12.6 (#4)

# Bump `alloy` to version `0.12.6`

This PR bumps `alloy` to version `0.12.6` to be consistent with the rest of the signet ecosystem.

Author: dylanlott

Cargo.toml

@@ -32,7 +32,7 @@ metrics-exporter-prometheus = "0.16.2"
 
 # Other
 thiserror = "2.0.11"
-alloy = { version = "0.11.1", optional = true, default-features = false, features = ["std"] }
+alloy = { version = "0.12.6", optional = true, default-features = false, features = ["std"] }
 
 [dev-dependencies]
 ajj = "0.3.1"