fix: change links in Vue READMEs to absolute URLs

While relative links work well within the Github UI, the package READMEs are also rendered
on npmjs and the API docs where they no longer resolve. This is now fixed by converting
them to absolute URLs.

packages/vue/vue-vanilla/README.md

@@ -95,15 +95,15 @@ export default defineComponent({
 By default the Vanilla Renderers don't apply any CSS at all.
 For a quick start you can use `@jsonforms/vue-vanilla/vanilla.css`.
 
-For more information on how JSON Forms can be configured, please see the [README of `@jsonforms/vue`](../vue/README.md).
+For more information on how JSON Forms can be configured, please see the [README of `@jsonforms/vue`](https://github.com/eclipsesource/jsonforms/blob/master/packages/vue/vue/README.md).
 
 ### Styling
 
 Each rendered HTML element specifies a CSS class which can be used to style it.
 This process can also be customized so that each element declares user-specified CSS classes.
 Therefore JSON Forms Vue Vanilla can be integrated with any CSS-only UI framework quite easily.
 
-You can find the default CSS classes in `[defaultStyles.ts](src/styles/defaultStyles.ts).
+You can find the default CSS classes in `[defaultStyles.ts](https://github.com/eclipsesource/jsonforms/blob/master/packages/vue/vue-vanilla/src/styles/defaultStyles.ts).
 
 To render your own classes simply `provide` them as `styles`.
 These `styles` replace the `defaultStyles`.

packages/vue2/vue2-vanilla/README.md

@@ -131,15 +131,15 @@ export default defineComponent({
 By default the Vanilla Renderers don't apply any CSS at all.
 For a quick start you can use `@jsonforms/vue-vanilla/vanilla.css`.
 
-For more information on how JSON Forms can be configured, please see the [README of `@jsonforms/vue2`](../vue2/README.md).
+For more information on how JSON Forms can be configured, please see the [README of `@jsonforms/vue2`](https://github.com/eclipsesource/jsonforms/blob/master/packages/vue2/vue2/README.md).
 
 ### Styling
 
 Each rendered HTML element specifies a CSS class which can be used to style it.
 This process can also be customized so that each element declares user-specified CSS classes.
 Therefore JSON Forms Vue Vanilla can be integrated with any CSS-only UI framework quite easily.
 
-You can find the default CSS classes in `[defaultStyles.ts](src/styles/defaultStyles.ts).
+You can find the default CSS classes in `[defaultStyles.ts](https://github.com/eclipsesource/jsonforms/blob/master/packages/vue/vue-vanilla/src/styles/defaultStyles.ts).
 
 To render your own classes simply `provide` them as `styles`.
 These `styles` replace the `defaultStyles`.