Add stats badge for Codecov.io in README.md (dsccommunity#235)

[skip ci] +semver:skip

Author: johlju

CHANGELOG.md

@@ -64,6 +64,7 @@ For older change log history see the [historic changelog](HISTORIC_CHANGELOG.md)
   - Update the deploy stage so that it is skipped when merging
     branch master in forks.
   - Adding back publishing code coverage to Codecov.io.
+    - Add stats badge for Codecov.io in README.md.
 - xClusterPreferredOwner
   - Fixed broken links to examples in README.md.
 - xClusterQuorum
@@ -75,7 +76,6 @@ For older change log history see the [historic changelog](HISTORIC_CHANGELOG.md)
 
 ### Removed
 
-- Removed the file `.codecov.yml` since Codecov is no longer used.
 - Removed the file `Deploy.PSDeploy.ps1` since it is not longer used by
   the build pipeline.
 

README.md

@@ -2,6 +2,7 @@
 
 [![Build Status](https://dev.azure.com/dsccommunity/xFailOverCluster/_apis/build/status/dsccommunity.xFailOverCluster?branchName=master)](https://dev.azure.com/dsccommunity/xFailOverCluster/_build/latest?definitionId=5&branchName=master)
 ![Azure DevOps coverage (branch)](https://img.shields.io/azure-devops/coverage/dsccommunity/xFailOverCluster/5/master)
+[![codecov](https://codecov.io/gh/dsccommunity/xFailOverCluster/branch/master/graph/badge.svg)](https://codecov.io/gh/dsccommunity/xFailOverCluster)
 [![Azure DevOps tests](https://img.shields.io/azure-devops/tests/dsccommunity/xFailOverCluster/5/master)](https://dsccommunity.visualstudio.com/xFailOverCluster/_test/analytics?definitionId=5&contextType=build)
 [![PowerShell Gallery (with prereleases)](https://img.shields.io/powershellgallery/vpre/xFailOverCluster?label=xFailOverCluster%20Preview)](https://www.powershellgallery.com/packages/xFailOverCluster/)
 [![PowerShell Gallery](https://img.shields.io/powershellgallery/v/xFailOverCluster?label=xFailOverCluster)](https://www.powershellgallery.com/packages/xFailOverCluster/)