Added missing period for consistency and readability (#15114)

Added a missing period in a specific part of the text to maintain consistency across the document. This ensures a uniform writing style, improves readability, and aligns with the formatting used throughout the content.

Author: shaymolcho

CONTRIBUTING.md

@@ -51,7 +51,7 @@ We use [GitHub issues](https://github.com/sveltejs/svelte/issues) for our public
 
 If you have questions about using Svelte, contact us on Discord at [svelte.dev/chat](https://svelte.dev/chat), and we will do our best to answer your questions.
 
-If you see anything you'd like to be implemented, create a [feature request issue](https://github.com/sveltejs/svelte/issues/new?template=feature_request.yml)
+If you see anything you'd like to be implemented, create a [feature request issue](https://github.com/sveltejs/svelte/issues/new?template=feature_request.yml).
 
 ### Reporting new issues