[PPML] Fix Kubernetes typo PPML QuickStart doc (#3590)

* Fix Kubernetes typo PPML QuickStart doc
* Rename the doc title
* Fix link

docs/readthedocs/source/doc/PPML/QuickStart/deploy_intel_sgx_device_plugin_for_kubernetes.md

@@ -1,4 +1,4 @@
-# Deploy the Intel SGX Device Plugin for Kubenetes
+# Deploy the Intel SGX Device Plugin for Kubernetes
 
 The instructions in this section are modified from the [Intel SGX Device Plugin homepage][intelSGX], to which please refer should questions arise.
 

docs/readthedocs/source/doc/PPML/QuickStart/trusted-serving-on-k8s-guide.md

@@ -4,7 +4,7 @@
 Prior to deploying PPML Cluster Serving, please make sure the following is setup
 - Hardware that supports SGX
 - A fully configured Kubernetes cluster 
-- Intel SGX Device Plugin to use SGX in K8S cluster (install following instructions [here](https://github.com/intel-analytics/BigDL/tree/branch-2.0/ppml/trusted-realtime-ml/scala/docker-graphene/kubernetes#deploy-the-intel-sgx-device-plugin-for-kubenetes "here"))
+- Intel SGX Device Plugin to use SGX in K8S cluster (install following instructions [here](https://github.com/intel-analytics/BigDL/tree/branch-2.0/ppml/trusted-realtime-ml/scala/docker-graphene/kubernetes#deploy-the-intel-sgx-device-plugin-for-kubernetes "here"))
 - Java
 
 ## Deploy Trusted Realtime ML for Kubernetes ##

docs/readthedocs/source/index.rst

@@ -82,7 +82,7 @@ BigDL Documentation
    doc/PPML/Overview/trusted_big_bata_analytics_and_ml.md
    doc/PPML/Overview/trusted_fl.md
    doc/PPML/QuickStart/build_kernel_with_sgx.md
-   doc/PPML/QuickStart/deploy_intel_sgx_device_plugin_for_kubernets.md
+   doc/PPML/QuickStart/deploy_intel_sgx_device_plugin_for_kubernetes.md
    doc/PPML/QuickStart/trusted-serving-on-k8s-guide.md
 
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