chore: prepare for Tokio v1.26.0 release (#5521)

# 1.26.0 (March 1st, 2023)

### Fixed

- macros: fix empty `join!` and `try_join!` ([#5504])
- sync: don't leak tracing spans in mutex guards ([#5469])
- sync: drop wakers after unlocking the mutex in Notify ([#5471])
- sync: drop wakers outside lock in semaphore ([#5475])

### Added

- fs: add `fs::try_exists` ([#4299])
- net: add types for named unix pipes ([#5351])
- sync: add `MappedOwnedMutexGuard` ([#5474])

### Changed

- chore: update windows-sys to 0.45 ([#5386])
- net: use Message Read Mode for named pipes ([#5350])
- sync: mark lock guards with `#[clippy::has_significant_drop]` ([#5422])
- sync: reduce contention in watch channel ([#5464])
- time: remove cache padding in timer entries ([#5468])
- time: Improve `Instant::now()` perf with test-util ([#5513])

### Internal Changes

- io: use `poll_fn` in `copy_bidirectional` ([#5486])
- net: refactor named pipe builders to not use bitfields ([#5477])
- rt: remove Arc from Clock ([#5434])
- sync: make `notify_waiters` calls atomic ([#5458])
- time: don't store deadline twice in sleep entries ([#5410])

### Unstable

- metrics: add a new metric for budget exhaustion yields ([#5517])

### Documented

- io: improve AsyncFd example ([#5481])
- runtime: document the nature of the main future ([#5494])
- runtime: remove extra period in docs ([#5511])
- signal: updated Documentation for Signals ([#5459])
- sync: add doc aliases for `blocking_*` methods ([#5448])
- sync: fix docs for Send/Sync bounds in broadcast ([#5480])
- sync: document drop behavior for channels ([#5497])
- task: clarify what happens to spawned work during runtime shutdown ([#5394])
- task: clarify `process::Command` docs ([#5413])
- task: fix wording with 'unsend' ([#5452])
- time: document immediate completion guarantee for timeouts ([#5509])
- tokio: document supported platforms ([#5483])

[#4299]: https://github.com/tokio-rs/tokio/pull/4299
[#5350]: https://github.com/tokio-rs/tokio/pull/5350
[#5351]: https://github.com/tokio-rs/tokio/pull/5351
[#5386]: https://github.com/tokio-rs/tokio/pull/5386
[#5394]: https://github.com/tokio-rs/tokio/pull/5394
[#5410]: https://github.com/tokio-rs/tokio/pull/5410
[#5413]: https://github.com/tokio-rs/tokio/pull/5413
[#5422]: https://github.com/tokio-rs/tokio/pull/5422
[#5434]: https://github.com/tokio-rs/tokio/pull/5434
[#5448]: https://github.com/tokio-rs/tokio/pull/5448
[#5452]: https://github.com/tokio-rs/tokio/pull/5452
[#5458]: https://github.com/tokio-rs/tokio/pull/5458
[#5459]: https://github.com/tokio-rs/tokio/pull/5459
[#5464]: https://github.com/tokio-rs/tokio/pull/5464
[#5468]: https://github.com/tokio-rs/tokio/pull/5468
[#5469]: https://github.com/tokio-rs/tokio/pull/5469
[#5471]: https://github.com/tokio-rs/tokio/pull/5471
[#5474]: https://github.com/tokio-rs/tokio/pull/5474
[#5475]: https://github.com/tokio-rs/tokio/pull/5475
[#5477]: https://github.com/tokio-rs/tokio/pull/5477
[#5480]: https://github.com/tokio-rs/tokio/pull/5480
[#5481]: https://github.com/tokio-rs/tokio/pull/5481
[#5483]: https://github.com/tokio-rs/tokio/pull/5483
[#5486]: https://github.com/tokio-rs/tokio/pull/5486
[#5494]: https://github.com/tokio-rs/tokio/pull/5494
[#5497]: https://github.com/tokio-rs/tokio/pull/5497
[#5504]: https://github.com/tokio-rs/tokio/pull/5504
[#5509]: https://github.com/tokio-rs/tokio/pull/5509
[#5511]: https://github.com/tokio-rs/tokio/pull/5511
[#5513]: https://github.com/tokio-rs/tokio/pull/5513
[#5517]: https://github.com/tokio-rs/tokio/pull/5517

README.md

@@ -56,7 +56,7 @@ Make sure you activated the full features of the tokio crate on Cargo.toml:
 
 ```toml
 [dependencies]
-tokio = { version = "1.25.0", features = ["full"] }
+tokio = { version = "1.26.0", features = ["full"] }
 ```
 Then, on your main.rs: