[P2P] Add changelog for #304 (#317)

## Description

Adding a missing changelog not added in #304

## Issue

Fixes #277

## Type of change

Please mark the relevant option(s):

- [ ] New feature, functionality or library
- [ ] Bug fix
- [ ] Code health or cleanup
- [ ] Major breaking change
- [x] Documentation
- [ ] Other <!-- add details here if it a different type of change -->

## List of changes

- Updated P2P changelog corresponding to #304

## Testing

- [x] `make develop_test`
- [x] [LocalNet](https://github.com/pokt-network/pocket/blob/main/docs/development/README.md) w/ all of the steps outlined in the `README`

## Required Checklist

- [x] I have performed a self-review of my own code
- [x] I have commented my code, particularly in hard-to-understand areas
- [x] I have tested my changes using the available tooling
- [x] I have updated the corresponding CHANGELOG

### If Applicable Checklist
- [ ] I have updated the corresponding README(s); local and/or global
- [ ] I have added tests that prove my fix is effective or that my feature works
- [ ] I have added, or updated, [mermaid.js](https://mermaid-js.github.io) diagrams in the corresponding README(s)
- [ ] I have added, or updated, documentation and [mermaid.js](https://mermaid-js.github.io) diagrams in `shared/docs/*` if I updated `shared/*`README(s)

p2p/CHANGELOG.md

@@ -7,6 +7,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.0.0.6] - 2022-10-20
+
+- Add a telemetry `send` event within the context `RainTree` network module that is triggered during network writes
+- Change the `RainTree` testing framework counting method to simulate real reads/writes from the network
+- Improve documentation related to the `RainTree` testing framework & how the counters are computed
+
 ## [0.0.0.5] - 2022-10-12
 
 ### [#235](https://github.com/pokt-network/pocket/pull/235) Config and genesis handling