chore(deps): update derive_builder requirement in /proxy-bin

Updates the requirements on [derive_builder](https://github.com/colin-kiegel/rust-derive-builder) to permit the latest version.
- [Release notes](https://github.com/colin-kiegel/rust-derive-builder/releases)
- [Commits](colin-kiegel/rust-derive-builder@v0.12.0...v0.13.0)

---
updated-dependencies:
- dependency-name: derive_builder
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

proxy-bin/Cargo.toml

@@ -37,7 +37,7 @@ doh-auth-proxy-lib = { path = "../proxy-lib/" }
 anyhow = "1.0.79"
 mimalloc = { version = "*", default-features = false }
 serde = { version = "1.0.195", default-features = false, features = ["derive"] }
-derive_builder = "0.12.0"
+derive_builder = "0.13.0"
 tokio = { version = "1.35.1", default-features = false, features = [
   "net",
   "rt-multi-thread",