Update lint example for collapsible_str_replace

[mgrachev]

To fix this warning:

warning: the borrowed expression implements the required traits
  --> src/fixes/quote_character.rs:16:43
   |
16 |         let hello = "hesuo worpd".replace(&['s', 'u', 'p'], "l");
   |                                           ^^^^^^^^^^^^^^^^ help: change this to: `['s', 'u', 'p']`
   |
   = note: `#[warn(clippy::needless_borrow)]` on by default
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow

Please write a short comment explaining your change (or "none" for internal only changes)

changelog: none

[rust-highfive]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @Manishearth (or someone else) soon.

Please see the contribution instructions for more information.

[Manishearth]

@bors r+

[bors]

📌 Commit 7001085 has been approved by Manishearth

It is now in the queue for this repository.

[bors]

⌛ Testing commit 7001085 with merge c4fbe54...

[bors]

☀️ Test successful - checks-action_dev_test, checks-action_remark_test, checks-action_test
Approved by: Manishearth
Pushing c4fbe54 to master...