Bump memmap2 from 0.5.0 to 0.5.1 (#22409)

* Bump memmap2 from 0.5.0 to 0.5.1

Bumps [memmap2](https://github.com/RazrFalcon/memmap2-rs) from 0.5.0 to 0.5.1.
- [Release notes](https://github.com/RazrFalcon/memmap2-rs/releases)
- [Changelog](https://github.com/RazrFalcon/memmap2-rs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/RazrFalcon/memmap2-rs/compare/v0.5.0...v0.5.1)

---
updated-dependencies:
- dependency-name: memmap2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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* [auto-commit] Update all Cargo lock files

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: dependabot-buildkite <dependabot-buildkite@noreply.solana.com>

runtime/Cargo.toml

@@ -24,7 +24,7 @@ fnv = "1.0.7"
 itertools = "0.10.3"
 lazy_static = "1.4.0"
 log = "0.4.14"
-memmap2 = "0.5.0"
+memmap2 = "0.5.1"
 num_cpus = "1.13.1"
 num-derive = { version = "0.3" }
 num-traits = { version = "0.2" }