chore: add french links to README (#14434)

README.md

@@ -68,6 +68,7 @@
   - [International users](http://element.eleme.io/#/en-US)
   - [Chinese users](http://element-cn.eleme.io/#/zh-CN)
   - [Spanish users](http://element.eleme.io/#/es)
+  - [French users](http://element.eleme.io/#/fr-FR)
 - [awesome-element](https://github.com/ElementUI/awesome-element)
 - [FAQ](./FAQ.md)
 - [Customize theme](http://element.eleme.io/#/en-US/component/custom-theme)
@@ -114,7 +115,7 @@ Modern browsers and Internet Explorer 10+.
 ## Development
 Skip this part if you just want to use Element.
 
-For those who are interested in contributing to Element, please refer to our contributing guide ([中文](https://github.com/ElemeFE/element/blob/master/.github/CONTRIBUTING.zh-CN.md) | [English](https://github.com/ElemeFE/element/blob/master/.github/CONTRIBUTING.en-US.md) | [Español](https://github.com/ElemeFE/element/blob/master/.github/CONTRIBUTING.es.md)) to see how to run this project.
+For those who are interested in contributing to Element, please refer to our contributing guide ([中文](https://github.com/ElemeFE/element/blob/master/.github/CONTRIBUTING.zh-CN.md) | [English](https://github.com/ElemeFE/element/blob/master/.github/CONTRIBUTING.en-US.md) | [Español](https://github.com/ElemeFE/element/blob/master/.github/CONTRIBUTING.es.md) | [Français](https://github.com/ElemeFE/element/blob/master/.github/CONTRIBUTING.fr-FR.md)) to see how to run this project.
 
 ## Changelog
 Detailed changes for each release are documented in the [release notes](https://github.com/ElemeFE/element/releases).
@@ -123,7 +124,7 @@ Detailed changes for each release are documented in the [release notes](https://
 We have collected some [frequently asked questions](https://github.com/ElemeFE/element/blob/master/FAQ.md). Before reporting an issue, please search if the FAQ has the answer to your problem.
 
 ## Contribution
-Please make sure to read the contributing guide ([中文](https://github.com/ElemeFE/element/blob/master/.github/CONTRIBUTING.zh-CN.md) | [English](https://github.com/ElemeFE/element/blob/master/.github/CONTRIBUTING.en-US.md) | [Español](https://github.com/ElemeFE/element/blob/master/.github/CONTRIBUTING.es.md)) before making a pull request.
+Please make sure to read the contributing guide ([中文](https://github.com/ElemeFE/element/blob/master/.github/CONTRIBUTING.zh-CN.md) | [English](https://github.com/ElemeFE/element/blob/master/.github/CONTRIBUTING.en-US.md) | [Español](https://github.com/ElemeFE/element/blob/master/.github/CONTRIBUTING.es.md) | [Français](https://github.com/ElemeFE/element/blob/master/.github/CONTRIBUTING.fr-FR.md)) before making a pull request.
 
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