Merge pull request #265 from furkatgofurov7/add-e2e-badge

docs: update readme with e2e badge

README.md

@@ -1,3 +1,5 @@
+[![Nightly e2e tests](https://github.com/rancher/gke-operator/actions/workflows/e2e-latest-rancher.yaml/badge.svg?branch=main)](https://github.com/rancher/gke-operator/actions/workflows/e2e-latest-rancher.yaml)
+
 # gke-operator
 
 The GKE operator is a controller for Kubernetes Custom Resource Definitions (CRDs) that manages cluster provisioning in Google Kubernetes Engine. It uses a GKEClusterConfig defined by a CRD.
@@ -104,4 +106,4 @@ After pushing the release tag, you need to run 2 Github Actions. You can find th
 
 unRC is the process of removing the rc from a KEv2 operator tag and means the released version is stable and ready for use. Release the KEv2 operator but instead of bumping the rc, remove the rc. For example, if the latest release of GKE operator is:
 * `v1.1.3-rc1`, release the next version without the rc which would be `v1.1.3`.
-* `v1.1.3`, that has no rc so release that version or `v1.1.4` if updates are available.
+* `v1.1.3`, that has no rc so release that version or `v1.1.4` if updates are available.