fix(setup-rollup): op-program uses genesi-l2.json instead

[jsvisa]

Description

op-program uses <chain-id>-genesis-l2.json instead, else an error raised:

./bin/op-program configs check-custom-chains
t=2025-10-21T08:35:05+0000 lvl=crit msg="Application failed" err="invalid config file name: 16584-genesis.json, Make sure that the only files in the custom config directory are placeholder.json, depsets.json, <chai
n-id>-genesis-l2.json or <chain-id>-rollup.json"

Tests

Additional context

Metadata

[netlify]

✅ Deploy Preview for docs-optimism ready!

Built without sensitive environment variables

Name	Link
🔨 Latest commit	b45ef35
🔍 Latest deploy log	https://app.netlify.com/projects/docs-optimism/deploys/68f7491646ae7a00089241db
😎 Deploy Preview	https://deploy-preview-1798--docs-optimism.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[jsvisa]

@krofax please take a look at this one