docs: update contribution section

Author: deandreamatias

README.md

@@ -1,11 +1,12 @@
 # Form Builder Phone Field
 
+International phone number field for [flutter_form_builder](https://pub.dev/packages/flutter_form_builder) package.
+
 [![Pub Version](https://img.shields.io/pub/v/form_builder_phone_field?logo=flutter&style=for-the-badge)](https://pub.dev/packages/form_builder_phone_field)
 [![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/flutter-form-builder-ecosystem/form_builder_phone_field/base.yaml?branch=main&logo=github&style=for-the-badge)](https://github.com/flutter-form-builder-ecosystem/form_builder_phone_field/actions/workflows/base.yaml)
 [![CodeFactor Grade](https://img.shields.io/codefactor/grade/github/flutter-form-builder-ecosystem/form_builder_phone_field?logo=codefactor&style=for-the-badge)](https://www.codefactor.io/repository/github/flutter-form-builder-ecosystem/form_builder_phone_field)
 [![Codecov](https://img.shields.io/codecov/c/github/flutter-form-builder-ecosystem/form_builder_phone_field?logo=codecov&style=for-the-badge)](https://codecov.io/gh/flutter-form-builder-ecosystem/form_builder_phone_field/)
 
-International phone number field for [flutter_form_builder](https://pub.dev/packages/flutter_form_builder) package.
 ___
 
 - [Features](#features)
@@ -19,7 +20,6 @@ ___
 - [Roadmap](#roadmap)
 - [Ecosystem](#ecosystem)
 - [Thanks to](#thanks-to)
-  - [Contributors](#contributors)
 
 ## Features
 
@@ -84,12 +84,4 @@ Take a look to [our awesome ecosystem](https://github.com/flutter-form-builder-e
 
 ## Thanks to
 
-### Contributors
-
-**Contributors**
-
-<a href="https://github.com/flutter-form-builder-ecosystem/form_builder_phone_field/graphs/contributors">
-  <img src="https://contrib.rocks/image?repo=flutter-form-builder-ecosystem/form_builder_phone_field" />
-</a>
-
-Made with [contrib.rocks](https://contrib.rocks).
+[All constributors](https://github.com/flutter-form-builder-ecosystem/form_builder_phone_field/graphs/contributors)