fix the Contributing link (#2686)

Added the correct link for CONTRIBUTING.md

Author: guptadeepak8

docusaurus/docs/cms/community.md

@@ -18,7 +18,7 @@ Strapi is an open-source project (see <ExternalLink to="https://github.com/strap
 
 As it goes hand in hand with the open-source ecosystem, Strapi is open to contributions. The Strapi team appreciates every contribution, be it a feature request, bug report, or pull request. The following GitHub repositories are open-source and contributions-friendly:
 
-- <ExternalLink to="https://github.com/strapi/strapi" text="`strapi/strapi`"/>: main repository of Strapi, which contains the core of the project. You can find the admin panel, core plugins, plugin providers, and the whole code that runs your Strapi application. Please read the <ExternalLink to="https://github.com/strapi/strapi/blob/master/CONTRIBUTING.md" text="`CONTRIBUTING.md`"/> file to have more information about contributions to the main repository.
+- <ExternalLink to="https://github.com/strapi/strapi" text="`strapi/strapi`"/>: main repository of Strapi, which contains the core of the project. You can find the admin panel, core plugins, plugin providers, and the whole code that runs your Strapi application. Please read the <ExternalLink to="https://github.com/strapi/strapi/blob/develop/CONTRIBUTING.md" text="`CONTRIBUTING.md`"/> file to have more information about contributions to the main repository.
 - <ExternalLink to="https://github.com/strapi/documentation" text="`strapi/documentation`"/>: contains the whole documentation of Strapi. Please read the <ExternalLink to="https://github.com/strapi/documentation/blob/main/CONTRIBUTING.md" text="contribution guide"/> to have more information about contributions to the Strapi documentation.
 - <ExternalLink to="https://github.com/strapi/design-system" text="`strapi/design-system`"/>: is the design system that is used in the admin panel. It brings consistency between the different admin plugins.
 - <ExternalLink to="https://github.com/strapi/awesome-strapi" text="`strapi-community/awesome-strapi`"/>: contains everything the community built and all managed plugins. It is used as a central place to find and submit new packages such as plugins, middlewares, hooks, and general enhancements to the core of Strapi.