Add cool badges to README

LICENSE is missing, I'll create a separate PR for that.

Author: Ostrzyciel

README.md

@@ -1,3 +1,5 @@
+[![GitHub Action Marketplace](https://img.shields.io/badge/GitHub%20Action-Marketplace-blue)](https://github.com/marketplace/actions/setup-jelly-cli) [![GitHub Actions Workflow Status](https://img.shields.io/github/actions/workflow/status/Jelly-RDF/setup-cli/test.yml)](https://github.com/Jelly-RDF/setup-cli/actions) [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0) [![Discord](https://img.shields.io/discord/1333391881404420179?label=Discord%20chat)](https://discord.gg/A8sN5XwVa5)
+
 # Setup Jelly CLI for GitHub Actions
 Setup [Jelly CLI](https://github.com/Jelly-RDF/cli) in GitHub Actions to use `jelly-cli`.
 By default the action finds and downloads the latest version.
@@ -17,14 +19,14 @@ steps:
 
 ## Inputs
 ### `version` (optional)
-Version of the Jelly CLI to install, e.g., `v0.4.8`. Default: `latest`
+Version of the Jelly CLI to install, e.g., `v0.5.0`. Default: `latest`
 
 ### `token` (optional)
 GitHub token to use when searching the latest release. Unused if version is provided. Default: `${{ github.token }}`
 
 ### Example
 ```
 - uses: Jelly-RDF/setup-cli@v1
-  version: 'v0.4.8'
+  version: 'v0.5.0'
   token: ${{ secrets.GITHUB_TOKEN }}
 ```