Fix link in CHANGELOG.md
# v0.2.6 (2018-XX-XX)
* Fail compilation when using `default_value` or `required` with `bool` ([#80](https://github.com/TeXitoi/structopt/issues/80)) by [@TeXitoi](https://github.com/TeXitoi)
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-* Fix compilation with `#[deny(warnings)]` with the `!` type (https://github.com/rust-lang/rust/pull/49039#issuecomment-376420816) by [@TeXitoi](https://github.com/TeXitoi)
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+* Fix compilation with `#[deny(warnings)]` with the `!` type (https://github.com/rust-lang/rust/pull/49039#issuecomment-376398999) by [@TeXitoi](https://github.com/TeXitoi)
* Improve first example in the documentation ([#82](https://github.com/TeXitoi/structopt/issues/82)) by [@TeXitoi](https://github.com/TeXitoi)
# v0.2.5 (2018-03-07)
