Bump url_launcher (#1138)

Bumps [url_launcher](https://github.com/flutter/plugins) from 6.0.20 to 6.1.0.
- [Release notes](https://github.com/flutter/plugins/releases)
- [Commits](https://github.com/flutter/plugins/compare/url_launcher-v6.0.20...url_launcher-v6.1.0)

---
updated-dependencies:
- dependency-name: url_launcher
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

add_to_app/multiple_flutters/multiple_flutters_module/pubspec.lock

@@ -188,7 +188,7 @@ packages:
       name: url_launcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "6.0.20"
+    version: "6.1.0"
   url_launcher_android:
     dependency: transitive
     description: