Bump memchr from 2.8.0 to 2.8.1 (#8038)

Bumps [memchr](https://github.com/BurntSushi/memchr) from 2.8.0 to 2.8.1.
- [Commits](https://github.com/BurntSushi/memchr/compare/2.8.0...2.8.1)

---
updated-dependencies:
- dependency-name: memchr
  dependency-version: 2.8.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Cargo.lock

@@ -2321,9 +2321,9 @@ dependencies = [
 
 [[package]]
 name = "memchr"
-version = "2.8.0"
+version = "2.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f8ca58f447f06ed17d5fc4043ce1b10dd205e060fb3ce5b979b8ed8e59ff3f79"
+checksum = "6b947ae49db0d222b1dbc6b113ce7248a3fc3a6ca21b696717bfc000ba4484d8"
 
 [[package]]
 name = "memmap2"

Cargo.toml

@@ -257,7 +257,7 @@ malachite-bigint = "0.9.1"
 malachite-q = "0.9.1"
 malachite-base = "0.9.1"
 md-5 = "0.11"
-memchr = "2.8.0"
+memchr = "2.8.1"
 memmap2 = "0.9.10"
 mt19937 = "3.3"
 num-complex = "0.4.6"