Update Inventory for heroku/nodejs-engine (#802)

- Added Node.js version 18.20.0.
- Added Node.js version 20.12.0.

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

Author: heroku-linguist[bot]

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 20.12.0.
+- Added Node.js version 18.20.0.
 ## [3.0.1] - 2024-03-11
 
 - Added Node.js version 21.7.1.

buildpacks/nodejs-engine/inventory.toml

@@ -5439,6 +5439,13 @@ arch = "linux-x64"
 url = "https://heroku-nodebin.s3.us-east-1.amazonaws.com/node/release/linux-x64/node-v18.2.0-linux-x64.tar.gz"
 etag = "3e7b3258d258a95ba0e1ad06ed7f482d-6"
 
+[[releases]]
+version = "18.20.0"
+channel = "release"
+arch = "linux-x64"
+url = "https://heroku-nodebin.s3.us-east-1.amazonaws.com/node/release/linux-x64/node-v18.20.0-linux-x64.tar.gz"
+etag = "e14d7b25765e676961181ae825e35237-6"
+
 [[releases]]
 version = "18.3.0"
 channel = "release"
@@ -5621,6 +5628,13 @@ arch = "linux-x64"
 url = "https://heroku-nodebin.s3.us-east-1.amazonaws.com/node/release/linux-x64/node-v20.11.1-linux-x64.tar.gz"
 etag = "ad233338a82aa8ad65674d8ac692fcbf-6"
 
+[[releases]]
+version = "20.12.0"
+channel = "release"
+arch = "linux-x64"
+url = "https://heroku-nodebin.s3.us-east-1.amazonaws.com/node/release/linux-x64/node-v20.12.0-linux-x64.tar.gz"
+etag = "6c71dcbb9752eff4a3a26a9d323f0d47-6"
+
 [[releases]]
 version = "20.2.0"
 channel = "release"