v0.8.0-alpha.4

What's Changed

• [CI] Bump github/codeql-action from 3.23.2 to 3.24.0 by @dependabot in #840
• [CI] Bump actions/upload-artifact from 4.3.0 to 4.3.1 by @dependabot in #842
• Roll nightly toolchain by @joshlf in #845
• Support arbitrary toolchain versions in build.rs by @joshlf in #843
• Roll nightly toolchain by @joshlf in #846

Full Changelog: v0.8.0-alpha.3...v0.8.0-alpha.4