Update Node.js default to 22.11.0

[joshwlewis]

Node.js 22.x is now the Active LTS release line as of 10-29-2024 (source). In accordance with Heroku's Node.js support policy, it should be the default version.

The same change for Node.js 20: #1397

[schneems]

I've got some un-released changes on main. I'm going to roll this into those changes and aim for November 9th.

[schneems]

Confirming tests pass:

$ be rspec "./spec/helpers/node_installer_spec.rb[1:1:2]"
Run options: include {:focused=>true, :ids=>{"./spec/helpers/node_installer_spec.rb"=>["1:1:2"]}}
.

Finished in 2.81 seconds (files took 0.28492 seconds to load)
1 example, 0 failures

⛄️ 3.1.6 🚀 /Users/rschneeman/Documents/projects/work/heroku-buildpack-ruby (jwl/update-nodejs-default)
$ git log
commit 31b1cb92fcab4504c82194aaf35bd607589355cc (HEAD -> jwl/update-nodejs-default, origin/jwl/update-nodejs-default)

[schneems]

Actually, could you add an entry in changelogs/unreleased

Similar to:

## Ruby apps now default to Node version 20.9.0

Applications using the `heroku/ruby` buildpack that do not already have `node` installed by another buildpack (such as the `heroku/nodejs`
buildpack) will now receive:

- Node.js version 20.9.0 (was previously 16.18.1)

These versions and instructions on how to specify a specific version of these binaries can be found on the [installed binaries section of the Heroku Ruby Support page](https://devcenter.heroku.com/articles/ruby-support#installed-binaries).