doc: update README for v3.10.0 release

This commit updates README to deprecate 3.8.x release
and pin latest release to v3.10.0

Signed-off-by: Rakshith R <rar@redhat.com>

README.md

@@ -54,11 +54,10 @@ Status: **GA**
 Ceph CSI drivers are currently developed and tested **exclusively** in Kubernetes
 environments.
 
-| Ceph CSI Version | Container Orchestrator Name | Version Tested|
-| -----------------| --------------------------- | --------------|
-| v3.9.0 | Kubernetes | v1.25, v1.26, v1.27|
-| v3.8.1 | Kubernetes | v1.25, v1.26, v1.27|
-| v3.8.0 | Kubernetes | v1.24, v1.25, v1.26, v1.27|
+| Ceph CSI Version | Container Orchestrator Name | Version Tested     |
+| -----------------| --------------------------- | -------------------|
+| v3.10.0          | Kubernetes                  | v1.26, v1.27, v1.28|
+| v3.9.0           | Kubernetes                  | v1.25, v1.26, v1.27|
 
 There is work in progress to make this CO-independent and thus
 support other orchestration environments (Nomad, Mesos..etc).
@@ -129,12 +128,13 @@ in the Kubernetes documentation.
 | Ceph CSI Release/Branch | Container image name         | Image Tag |
 | ----------------------- | ---------------------------- | --------- |
 | devel (Branch)          | quay.io/cephcsi/cephcsi      | canary    |
+| v3.10.0 (Release)       | quay.io/cephcsi/cephcsi      | v3.10.0   |
 | v3.9.0 (Release)        | quay.io/cephcsi/cephcsi      | v3.9.0    |
-| v3.8.1 (Release)        | quay.io/cephcsi/cephcsi      | v3.8.1    |
-| v3.8.0 (Release)        | quay.io/cephcsi/cephcsi      | v3.8.0    |
 
 | Deprecated Ceph CSI Release/Branch | Container image name | Image Tag |
 | ----------------------- | --------------------------------| --------- |
+| v3.8.1 (Release)        | quay.io/cephcsi/cephcsi         | v3.8.1    |
+| v3.8.0 (Release)        | quay.io/cephcsi/cephcsi         | v3.8.0    |
 | v3.7.2 (Release)        | quay.io/cephcsi/cephcsi         | v3.7.2    |
 | v3.7.1 (Release)        | quay.io/cephcsi/cephcsi         | v3.7.1    |
 | v3.7.0 (Release)        | quay.io/cephcsi/cephcsi         | v3.7.0    |