Update Inventory for heroku/nodejs-engine (#682)

- Added Node.js version 18.18.2.
- Added Node.js version 20.8.1.

Co-authored-by: heroku-linguist[bot] <136119646+heroku-linguist[bot]@users.noreply.github.com>

buildpacks/nodejs-engine/CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+- Added Node.js version 20.8.1.
+- Added Node.js version 18.18.2.
 - Added Node.js version 18.18.1.
 - Added Node.js version 20.8.0.
 - Provides `npm` added to the build plan since a default version of `npm` is bundled with Node.js. ([#622](https://github.com/heroku/buildpacks-nodejs/pull/622))

buildpacks/nodejs-engine/inventory.toml

@@ -5411,6 +5411,13 @@ arch = "linux-x64"
 url = "https://heroku-nodebin.s3.us-east-1.amazonaws.com/node/release/linux-x64/node-v18.18.1-linux-x64.tar.gz"
 etag = "42f1a933e23073a3c891a724e131436c-6"
 
+[[releases]]
+version = "18.18.2"
+channel = "release"
+arch = "linux-x64"
+url = "https://heroku-nodebin.s3.us-east-1.amazonaws.com/node/release/linux-x64/node-v18.18.2-linux-x64.tar.gz"
+etag = "840d418911ebab9041cc40478e88481a-6"
+
 [[releases]]
 version = "18.2.0"
 channel = "release"
@@ -5649,6 +5656,13 @@ arch = "linux-x64"
 url = "https://heroku-nodebin.s3.us-east-1.amazonaws.com/node/release/linux-x64/node-v20.8.0-linux-x64.tar.gz"
 etag = "537d2c2b3f13e969b67e61e4f8ed8a0f-6"
 
+[[releases]]
+version = "20.8.1"
+channel = "release"
+arch = "linux-x64"
+url = "https://heroku-nodebin.s3.us-east-1.amazonaws.com/node/release/linux-x64/node-v20.8.1-linux-x64.tar.gz"
+etag = "641b5ed8d951cf81f68a150402e2493c-6"
+
 [[releases]]
 version = "4.0.0"
 channel = "release"