Fix count for redis_egress sg rule

[IrmantasMarozas]

Description

Fix count for redis_egress sg rule

I'm not sure why, but pre-commit hook for docs didn't work for me, so I commented it out.

Terraform docs...........................................................Failed

• hook id: terraform_docs
• exit code: 1
• files were modified by this hook

[Ohid25]

Has this been validated using one of the examples?

I tried running this change against one of the examples and I got

❯ terraform validate
╷
│ Error: Incorrect attribute value type
│
│   on ../../main.tf line 142, in resource "aws_security_group_rule" "redis_egress":
│  142:   cidr_blocks       = var.egress_cidr_blocks[count.index]
│     ├────────────────
│     │ count.index is a number
│     │ var.egress_cidr_blocks is a list of string
│
│ Inappropriate value for attribute "cidr_blocks": list of string required.

Second, I'm not totally sure what the issue is here in the first place. What is this solution trying to solve?