Update i18n.md (#574)

title case

docs/contributing/i18n.md

@@ -8,11 +8,11 @@ Currently, Actual Budget **is not yet ready** to receive community translations.
 
 :::
 
-## Current status
+## Current Status
 
 Actual is currently being prepared for internationalization (i18n). This means that initially everything in the app was English, but we're slowly marking all texts for translation.
 
-## Marking for translation
+## Marking for Translation
 
 Developing translated software requires that every text shown to the user passes through a translation function. Actual uses [i18next](https://www.i18next.com/) to achieve this goal.
 
@@ -28,7 +28,7 @@ When preparing your translatable strings, please use complete units to translate
 
 The translation framework provides two primary methods for translation:
 
-### `t()` function
+### `t()` Function
 
 The `t()` function is the simplest form of translation, it accepts the text to be translated and an optional object with interpolation variables. We're using the `i18next` singleton instance. You can use the hook within React components to get a reference to it.
 
@@ -56,7 +56,7 @@ const manyItems = t('You selected {{count}} items', { count: 4 });
 
 i18next will take care of proper pluralization rules in the currently active language and provide multiple different forms if required.
 
-### `<Trans>` component
+### `<Trans>` Component
 
 When translating text with simple HTML tags or other React components, you will need to use the [`<Trans>` component](https://react.i18next.com/latest/trans-component).