task: fix documentation links

[progval]

https://docs.rs/tokio/1.36.0/tokio/task/

[Darksonn]

Thank you! You'll need to update the spellcheck.dic file as well.

error: spellcheck(Hunspell)
  --> /home/runner/work/tokio/tokio/tokio/src/task/mod.rs:8
   |
 8 |  [green threads]. If you are familiar with [Go's goroutines], [Kotlin's
   |                                                  ^^^^^^^^^^
   | - go routines, go-routines, routines, routinizes, or rigorousness
   |
   |   Possible spelling mistake found.

error: spellcheck(Hunspell)
  --> /home/runner/work/tokio/tokio/tokio/src/task/mod.rs:8
   |
 8 |  [green threads]. If you are familiar with [Go's goroutines], [Kotlin's
   |                                                                ^^^^^^^^
   | - Kaitlin's
   |
   |   Possible spelling mistake found.

error: spellcheck(Hunspell)
  --> /home/runner/work/tokio/tokio/tokio/src/task/mod.rs:9
   |
 9 |  coroutines], or [Erlang's processes], you can think of Tokio's tasks as
   |  ^^^^^^^^^^
   | - co routines, co-routines, routines, or routinizes
   |
   |   Possible spelling mistake found.

error: spellcheck(Hunspell)
  --> /home/runner/work/tokio/tokio/tokio/src/task/mod.rs:9
   |
 9 |  coroutines], or [Erlang's processes], you can think of Tokio's tasks as
   |                   ^^^^^^^^
   | - Angler's
   |
   |   Possible spelling mistake found.

You should be able to add the words there. See the CONTRIBUTING.md file for details on how to run the spell checker.

[Darksonn]

Thank you.