minor #1329 [Site] Lazily load the toggle-password assets (weaverryan)

This PR was merged into the 2.x branch.

Discussion
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[Site] Lazily load the toggle-password assets

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| Issues        | None
| License       | MIT

Small performance improvement, especially since this controller contains a CSS file. Currently, that results in an extra, render-blocking `<link rel="stylesheet"` tag on the page. This is the perfect type of thing to make lazy.

Cheers!

Commits
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e5d9c40 [Site] Lazily load the toggle-password assets

Author: weaverryan

ux.symfony.com/assets/controllers.json

@@ -77,7 +77,7 @@
         "@symfony/ux-toggle-password": {
             "toggle-password": {
                 "enabled": true,
-                "fetch": "eager",
+                "fetch": "lazy",
                 "autoimport": {
                     "@symfony/ux-toggle-password/dist/style.min.css": true
                 }