chore: update templateName for js widget template

With a space in it, the release script threw an error.

Author: eunjae-lee

src/templates/InstantSearch.js widget/.template.js

@@ -5,7 +5,7 @@ module.exports = {
   category: 'Widget',
   libraryName: 'instantsearch.js',
   supportedVersion: '>= 4.21.0 < 5.0.0',
-  templateName: 'instantsearch.js widget',
+  templateName: 'instantsearch.js-widget',
   appName: 'instantsearch.js-app',
   keywords: ['algolia', 'InstantSearch', 'Vanilla', 'instantsearch.js', 'widget'],
   tasks: {