build(deps): bump zerocopy in /op-service/rethdb-reader (#8636)

Bumps [zerocopy](https://github.com/google/zerocopy) from 0.7.15 to 0.7.31.
- [Release notes](https://github.com/google/zerocopy/releases)
- [Changelog](https://github.com/google/zerocopy/blob/main/CHANGELOG.md)
- [Commits](https://github.com/google/zerocopy/compare/v0.7.15...v0.7.31)

---
updated-dependencies:
- dependency-name: zerocopy
  dependency-type: indirect
...
Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

op-service/rethdb-reader/Cargo.lock

@@ -5129,18 +5129,18 @@ dependencies = [
 
 [[package]]
 name = "zerocopy"
-version = "0.7.15"
+version = "0.7.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "81ba595b9f2772fbee2312de30eeb80ec773b4cb2f1e8098db024afadda6c06f"
+checksum = "1c4061bedbb353041c12f413700357bec76df2c7e2ca8e4df8bac24c6bf68e3d"
 dependencies = [
  "zerocopy-derive",
 ]
 
 [[package]]
 name = "zerocopy-derive"
-version = "0.7.15"
+version = "0.7.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "772666c41fb6dceaf520b564b962d738a8e1a83b41bd48945f50837aed78bb1d"
+checksum = "b3c129550b3e6de3fd0ba67ba5c81818f9805e58b8d7fee80a3a59d2c9fc601a"
 dependencies = [
  "proc-macro2",
  "quote",