docs: fix broken link to ARC implementation in interblock-cache.md (backport #24635)

[mergify]

Description

Updated the link to the ARC implementation in the interblock-cache documentation to point to the correct location in the hashicorp/golang-lru repository. The previous link pointed to a non-existent location as the file structure has changed - the arc.go file is now in the arc subdirectory rather than the root of the repository.

Author Checklist

All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues. Your PR will not be merged unless you satisfy
all of these items.

I have...

• included the correct type prefix in the PR title, you can find examples of the prefixes below:

• confirmed ! in the type prefix if API or client breaking change

• targeted the correct branch (see PR Targeting)

• provided a link to the relevant issue or specification

• reviewed "Files changed" and left comments if necessary

• included the necessary unit and integration tests

• added a changelog entry to CHANGELOG.md

• updated the relevant documentation or specification, including comments for documenting Go code

• confirmed all CI checks have passed

Summary by CodeRabbit

• Documentation
  • Updated the documentation to correct the URL for the ARC (adaptive replacement cache) implementation used by the inter-block cache.

---

This is an automatic backport of pull request #24635 done by [Mergify](https://mergify.com).

[ironbird-prod]

Ironbird - launch a network

To use Ironbird, you can use the following commands:

• /ironbird start OR /ironbird start --load-test-config= - Launch a testnet with the specified chain and load test configuration.
• /ironbird chains - List of chain images that ironbird can use to spin-up testnet
• /ironbird loadtests - List of load test modes that ironbird can run against testnet

Custom Load Test Configuration

You can provide a custom load test configuration using the `--load-test-config=` flag:

/ironbird start cosmos --load-test-config={
  "block_gas_limit_target": 0.75,
  "num_of_blocks": 50,
  "msgs": [
    {"weight": 0.3, "type": "MsgSend"},
    {"weight": 0.3, "type": "MsgMultiSend"},
	{"weight": 0.4, "type": "MsgArr", "ContainedType": "MsgSend", "NumMsgs": 3300}
  ]
}

Use /ironbird loadtests to see more examples.