docs: Fix typo in design-principles.mdx (#1199)

## Changes

docs: fix typo from `specic` to `specific`

Author: motss

docs/pages/docs/design-principles.mdx

@@ -48,7 +48,7 @@ Once internationalization is set up, adding a new language is in the simplest ca
 
 ## Standards-based
 
-With the introduction of [the ECMAScript Internationalization API](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl), JavaScript has gotten very capable in the recent years in regard to formatting of dates, times, numbers, lists and pluralization. `next-intl` builds on top of this API and provides an ergonomic interface to work with these features, while considering your app-specic configuration & needs.
+With the introduction of [the ECMAScript Internationalization API](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl), JavaScript has gotten very capable in the recent years in regard to formatting of dates, times, numbers, lists and pluralization. `next-intl` builds on top of this API and provides an ergonomic interface to work with these features, while considering your app-specific configuration & needs.
 
 For text formatting, `next-intl` is based on [International Components for Unicode (ICU)](https://unicode-org.github.io/icu/userguide/format_parse/). ICU is a mature and widely used standard for internationalization that is supported by many programming languages and frameworks. `next-intl` uses the ICU message syntax for defining text labels, which allows to express complex formatting requirements like interpolating variables and pluralization in a concise and readable way—also for non-developers like translators.