build(deps): bump libm from 0.2.7 to 0.2.8 (#30512)

Bumps [libm](https://github.com/rust-lang/libm) from 0.2.7 to 0.2.8.
- [Changelog](https://github.com/rust-lang/libm/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rust-lang/libm/compare/0.2.7...0.2.8)

---
updated-dependencies:
- dependency-name: libm
  dependency-type: indirect
  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

@@ -3287,9 +3287,9 @@ dependencies = [
 
 [[package]]
 name = "libm"
-version = "0.2.7"
+version = "0.2.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f7012b1bbb0719e1097c47611d3898568c546d597c2e74d66f6087edd5233ff4"
+checksum = "4ec2a862134d2a7d32d7983ddcdd1c4923530833c9f2ea1a44fc5fa473989058"
 
 [[package]]
 name = "libservo"