minor #1020 Change Vue reference to Svelte in docs (leonardsimonse)

This PR was merged into the 2.x branch.

Discussion
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Change Vue reference to Svelte in docs

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Tickets       | none
| License       | MIT

Symfony UX Svelte docs refer to Vue components. I'm assuming this is because the initial docs were based on the Vue bundle. This PR changes the reference to Svelte.

Commits
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7249ff5 Change Vue reference to Svelte in docs

src/Svelte/doc/index.rst

@@ -35,7 +35,7 @@ Then install the bundle using Composer and Symfony Flex:
 
 The Flex recipe will automatically set things up for you, like adding
 ``.enableSvelte()`` to your ``webpack.config.js`` file and adding code
-to load your Vue components inside ``assets/app.js``.
+to load your Svelte components inside ``assets/app.js``.
 
 Next, install a package to help Svelte: