Restart crate build: `linked_list_allocator` build failed because of nightly mismatch

[phil-opp]

Crate name: linked_list_allocator
Build failure link: https://docs.rs/crate/linked_list_allocator/0.9.0/builds/383672

Additional details: The crate was updated in rust-osdev/linked-list-allocator#50 to work with rust nightly 2021-04-30 (and newer), but docs.rs still used nightly 2021-04-24 at that point. According to https://docs.rs/about/builds docs.rs now uses nightly 2021-05-11, so restarting the build should fix the issue. Could you do that or do I need to release a new version? Thanks!

[jyn514]

Queued and rebuilt: https://docs.rs/linked_list_allocator/0.9.0/linked_list_allocator/

[phil-opp]

Thanks a lot!