Add missing fullstop to rule description

Author: uncommon-type

src/rules/label-has-associated-control.js

@@ -44,7 +44,7 @@ const validateId = (node) => {
 export default ({
   meta: {
     docs: {
-      description: 'Enforce that a `label` tag has a text label and an associated control',
+      description: 'Enforce that a `label` tag has a text label and an associated control.',
       url: 'https://github.com/jsx-eslint/eslint-plugin-jsx-a11y/blob/main/docs/rules/label-has-associated-control.md',
     },
     schema: [schema],