Not run workflow on *.md changes and fix links in README

.github/workflows/workflow.yml

@@ -1,5 +1,9 @@
 name: Main workflow
-on: [push]
+on:
+  push:
+    paths:
+    - '*'    
+    - '!*.md'
 jobs:
   run:
     name: Run

README.md

@@ -9,14 +9,14 @@
 <p align="left">
   <a href="https://github.com/shivammathur/setup-php"><img alt="GitHub Actions status" src="https://github.com/shivammathur/setup-php/workflows/Main%20workflow/badge.svg"></a>
   <a href="https://github.com/shivammathur/setup-php/blob/master/LICENSE"><img alt="LICENSE" src="https://img.shields.io/badge/license-MIT-428f7e.svg"></a>
-  <a href="https://github.com/shivammathur/setup-php#php-versions-support"><img alt="PHP Versions Supported" src="https://img.shields.io/badge/php-%3E%3D%205.6-8892BF.svg"></a> 
+  <a href="#tada-php-support"><img alt="PHP Versions Supported" src="https://img.shields.io/badge/php-%3E%3D%205.6-8892BF.svg"></a> 
   <a href="https://www.patreon.com/shivammathur"><img alt="Support me on Patreon" src="https://shivammathur.com/badges/patreon.svg"></a>   <a href="https://www.paypal.me/shivammathur"><img alt="Support me on Paypal" src="https://shivammathur.com/badges/paypal.svg"></a>
   <a href="https://www.codementor.io/shivammathur?utm_source=github&utm_medium=button&utm_term=shivammathur&utm_campaign=github"><img alt="Get Help on codementor" src="https://cdn.codementor.io/badges/get_help_github.svg"></a>  
 </p>
 
-Setup PHP with required extensions, php.ini configuration and composer in [GitHub Actions](https://github.com/features/actions). This action can be added as a step in your action workflow and it will setup the PHP environment you need to test your application. Refer to [Usage](#usage) section to see how to use this.
+Setup PHP with required extensions, php.ini configuration and composer in [GitHub Actions](https://github.com/features/actions). This action can be added as a step in your action workflow and it will setup the PHP environment you need to test your application. Refer to [Usage](#memo-usage) section to see how to use this.
 
-## :tada: PHP Supported Versions
+## :tada: PHP Support
 
 |PHP Version|Stability|Release Support|
 |--- |--- |--- |

package.json

@@ -23,8 +23,7 @@
   "license": "MIT",
   "dependencies": {
     "@actions/core": "^1.0.0",
-    "@actions/tool-cache": "^1.0.0",
-    "codecov": "^3.6.0",
+    "@actions/tool-cache": "^1.0.0",    
     "fs": "0.0.1-security",
     "typed-rest-client": "^1.5.0"
   },