Typo In aws-for-fluent-bit template firehose.extraOutputs section

**Describe the bug**
typo in configmap.yaml template - in the `.Values.firehose.enabled` if block the `extraOutputs` uses kinesis and not firehose

**Steps to reproduce**

**Expected outcome**
to pass values to the firehose section I would like to use `.Values.firehose.extraOutputs` but I have to use `.Values.kinesis.extraOutputs` instead

**Environment**

* Chart name: aws-for-fluent-bit
* Chart version: v0.0.170
* Kubernetes version: n/a
* Using EKS (yes/no), if so version? n/a

**Additional Context**:
```
https://github.com/aws/eks-charts/blob/master/stable/aws-for-fluent-bit/templates/configmap.yaml#L187
```

Open stable/aws-for-fluent-bit/templates/configmap.yaml around line 187 and inspect the `.Values.firehose.enabled` block. Verify how `extraOutputs` is referenced there and render or review the chart with firehose values; done means firehose configuration uses `.Values.firehose.extraOutputs` rather than the kinesis path.

Written by the indexing model from the issue text.