docs: Add a cookbook mention to the configurable rules page

[lornajane]

What/Why/How?

Adding a signpost to the cookbook to signpost to more configurable rules examples.

(this minor change is also to test if we can publish docs)

Check yourself

• Code is linted
• Tested with redoc/reference-docs/workflows (internal)
• All new/updated code is covered with tests

Security

• Security impact of change has been considered
• Code follows company security practices and guidelines

[changeset-bot]

⚠️ No Changeset found

Latest commit: 316de38

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[github-actions]

Command	Mean [s]	Min [s]	Max [s]	Relative
redocly lint packages/core/src/benchmark/benches/rebilly.yaml	1.035 ± 0.031	0.984	1.096	1.01 ± 0.03
redocly-next lint packages/core/src/benchmark/benches/rebilly.yaml	1.028 ± 0.017	1.009	1.068	1.00

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	76.17%	4068/5341
🟡	Branches	66.07%	2167/3280
🟡	Functions	68.39%	660/965
🟡	Lines	76.36%	3815/4996

Test suite run success

652 tests passing in 94 suites.

Report generated by 🧪jest coverage report action from 316de38