maint: Bump honeycomb chart appVersion to 2.7.0 (#226)

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## Which problem is this PR solving?

<please describe the issue>

- Closes #225

## Short description of the changes

- bump appVersion to 2.7.0

## How to verify that this has the expected result

- Ran locally in a kind cluster

charts/honeycomb/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 name: honeycomb
 description: Honeycomb Kubernetes Agent
 version: 1.6.0
-appVersion: 2.6.0
+appVersion: 2.7.0
 keywords:
   - observability
   - tracing