docs: Styling in README and slightly improved spelling in error message

Author: amannn

README.md

@@ -21,7 +21,7 @@
 
 ## Features
 
-Internationalization is an essential part of the user experience. next-intl gives you everything you need to get language subtleties right and has always got your back whenever you need to fine-tune a translation.
+Internationalization is an essential part of the user experience. `next-intl` gives you everything you need to get language subtleties right and has always got your back whenever you need to fine-tune a translation.
 
 - 🌟 **ICU message syntax**: Localize your messages with interpolation, cardinal & ordinal plurals, enum-based label selection and rich text.
 - 📅 **Dates, times & numbers**: Apply appropriate formatting without worrying about server/client differences like time zones.

packages/next-intl/src/navigation/react-client/createLocalizedPathnamesNavigation.tsx

@@ -33,7 +33,7 @@ export default function createLocalizedPathnamesNavigation<
     if (!isValid) {
       throw new Error(
         process.env.NODE_ENV !== 'production'
-          ? `Unknown locale encountered: "${locale}". Make sure to validate the locale in \`app/[locale]/layout.tsx\`.`
+          ? `Unknown locale encountered: "${locale}". Make sure to validate the locale in \`i18n.ts\`.`
           : undefined
       );
     }

packages/use-intl/README.md

@@ -4,7 +4,7 @@
 
 ## Features
 
-Internationalization is an essential part of the user experience. use-intl gives you everything you need to get language subtleties right and has always got your back whenever you need to fine-tune a translation.
+Internationalization is an essential part of the user experience. `use-intl` gives you everything you need to get language subtleties right and has always got your back whenever you need to fine-tune a translation.
 
 - 🌟 **ICU message syntax**: Localize your messages with interpolation, cardinal & ordinal plurals, enum-based label selection and rich text.
 - 📅 **Dates, times & numbers**: Apply appropriate formatting without worrying about server/client differences like time zones.