Update axum requirement from 0.7 to 0.8#20

dependabot[bot] wants to merge 1 commit intomainpolarsignals/rust-jemalloc-pprof:mainfrom

dependabot/cargo/axum-0.8polarsignals/rust-jemalloc-pprof:dependabot/cargo/axum-0.8Copy head branch name to clipboard