aws eks describe-cluster takes --name

* Working from HEAD of main (9e91a9a) of cloudmapper.
* aws-cli/2.0.50 Python/3.8.5 Darwin/19.6.0 source/x86_64

My collect step failed with:
```
...
Summary: 275 APIs called. 1 errors
Failures:
  eks.describe_cluster({'cluster': 'example-foo'}): Parameter validation failed:
Missing required parameter in input: "name"
```
which led me to: duo-labs#729
But the AWS CLI/SDK shows that `describe-cluster` takes `--name` not `--cluster`, so this PR changes the parameter we are passing. And allows `collect` to complete successfully.

collect_commands.yaml

@@ -352,7 +352,7 @@
 - Service: eks
   Request: describe-cluster
   Parameters:
-  - Name: cluster
+  - Name: name
     Value: eks-list-clusters.json|.clusters[]
 - Service: logs
   Request: describe-destinations