fix typo in document (aws#331)

Author: ysam12345

docs/sgp/workflow.md

@@ -3,7 +3,7 @@ This document presents high level workflow diagram for Events associated with No
 
 ## Adding a supported Node to Cluster
 
-Security Group for Pods is suported only on Nitro Based Instnaces.
+Security Group for Pods is supported only on Nitro Based Instances.
 
 ![New Nitro Based Node Create Event Diagram](../images/sgp-node-create.png)
 

docs/troubleshooting.md

@@ -38,7 +38,7 @@ To get the Platform Version of your EKS cluster
 aws eks describe-cluster --name cluster-name --region us-west-2 | jq .cluster.platformVersion
 ```
 
-Your Platform Version should be equal to or greater than Platfrom Version [specified here](https://github.com/aws/amazon-vpc-resource-controller-k8s/releases/tag/v1.1.0).
+Your Platform Version should be equal to or greater than Platform Version [specified here](https://github.com/aws/amazon-vpc-resource-controller-k8s/releases/tag/v1.1.0).
 
 **Resolution**