docs: add helm as an entry to package table

Author: Sacquer

docs/_docs/01_getting-started/packages-overview.md

@@ -23,7 +23,8 @@ Terratest's [modules folder](https://github.com/gruntwork-io/terratest/tree/main
 | **environment**    | Functions for interacting with os environment. Examples: check for first non empty environment variable in a list.                                                                                                                                                                                   |
 | **files**          | Functions for manipulating files and folders. Examples: check if a file exists, copy a folder and all of its contents.                                                                                                                                                                               |
 | **gcp**            | Functions that make it easier to work with the GCP APIs. Examples: Add labels to a Compute Instance, get the Public IPs of an Instance, Get a list of Instances in a Managed Instance Group, Work with Storage Buckets and Objects.                                                                                                                                                                                                                     |
-| **git**            | Functions for working with Git. Examples: get the name of the current Git branch.                                                                                                                                                                                                                    |
+| **git**            | Functions for working with Git. Examples: get the name of the current Git branch.                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
+| **helm**           | Functions for working with Helm. Examples: Install a Helm chart.                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
 | **http-helper**    | Functions for making HTTP requests. Examples: make an HTTP request to a URL and check the status code and body contain the expected values, run a simple HTTP server locally.                                                                                                                        |
 | **k8s**            | Functions that make it easier to work with Kubernetes. Examples: Getting the list of nodes in a cluster, waiting until all nodes in a cluster is ready.                                                                                                                                              |
 | **logger**         | A replacement for Go's `t.Log` and `t.Logf` that writes the logs to `stdout` immediately, rather than buffering them until the very end of the test. This makes debugging and iterating easier.                                                                                                      |