fix(docs): Update README Coverage Badges (#5395)

* docs: update README badges
* fix: update code coverage badge

Author: gajeshbhat

README.md

@@ -1,8 +1,8 @@
 # ![snapcraft.io](https://assets.ubuntu.com/v1/944b8760-snapcraft-logo-bird.svg?fmt=png&w=50 "Snapcraft") snapcraft.io codebase
 
-[Python Coverage](https://canonical.github.io/snapcraft.io/coverage/python) | [JavaScript Coverage](https://canonical.github.io/snapcraft.io/coverage/js)
+[![Python Coverage](https://img.shields.io/badge/Python%20Coverage-View%20Report-blue)](https://canonical.github.io/snapcraft.io/coverage/python) [![JavaScript Coverage](https://img.shields.io/badge/JavaScript%20Coverage-View%20Report-blue)](https://canonical.github.io/snapcraft.io/coverage/js)
 
-![Github Actions Status](https://github.com/canonical-web-and-design/snapcraft.io/workflows/main%20checks/badge.svg) [![Code coverage](https://codecov.io/gh/canonical-web-and-design/snapcraft.io/branch/master/graph/badge.svg)](https://codecov.io/gh/canonical-web-and-design/snapcraft.io)
+[![Github Actions Status](https://github.com/canonical/snapcraft.io/actions/workflows/coverage.yml/badge.svg)](https://github.com/canonical/snapcraft.io/actions/workflows/coverage.yml) [![Code coverage](https://codecov.io/gh/canonical/snapcraft.io/branch/main/graph/badge.svg)](https://codecov.io/gh/canonical/snapcraft.io)
 
 Snaps are applications packaged with all their dependencies to run on all popular Linux distributions from a single build. They update automatically and roll back gracefully. This repo is the application for the [snapcraft.io](https://snapcraft.io) website.