Update prost-build requirement in /rust_pajamax_bench (#534)

---
updated-dependencies:
- dependency-name: prost-build
  dependency-version: 0.14.1
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

rust_pajamax_bench/Cargo.toml

@@ -15,4 +15,4 @@ prost = "0.13.5"
 
 [build-dependencies]
 pajamax-build = "0.2.0"
-prost-build = "0.13.5"
+prost-build = "0.14.1"