chore: add commit lint "ignore" rule (#1145)

## Description
Prevents commitlint from throwing header-max-length errors on long,
dependabot-generated commit titles.

## Related Issue
Fixes #1124

## Type of change

- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [x] Other (security config, docs update, etc)

## Checklist before merging
- [x] Unit,
[Journey](https://github.com/defenseunicorns/pepr/tree/main/journey),
[E2E Tests](https://github.com/defenseunicorns/pepr-excellent-examples),
[docs](https://github.com/defenseunicorns/pepr/tree/main/docs),
[adr](https://github.com/defenseunicorns/pepr/tree/main/adr) added or
updated as needed
- [x] [Contributor Guide
Steps](https://docs.pepr.dev/main/contribute/#submitting-a-pull-request)
followed

Author: btlghrants

Diff for: commitlint.config.js

@@ -1 +1,8 @@
-module.exports = { extends: ["@commitlint/config-conventional"] };
+module.exports = {
+  extends: ["@commitlint/config-conventional"],
+  ignores: [
+    // prevent header-max-length error on long, dependabot-gen'd commits titles
+    //  https://github.com/dependabot/dependabot-core/issues/2445
+    (message) => /^chore: bump .+ from .+ to .+$/m.test(message)
+  ],
+};