feat: Allow changing runtime variable

[SanB16]

Description

When its required to update the runtime version, unable to update it as its hardcoded.

module "lambda" {
  runtime                        = "python3.11"
}

If your request is for a new feature, please use the Feature request template.

• ✋ I have searched the open/closed issues and my issue is not listed.

⚠️ Note

Before you submit an issue, please perform the following first:

1. Remove the local .terraform directory (! ONLY if state is stored remotely, which hopefully you are following that best practice!): rm -rf .terraform/
2. Re-initialize the project root to pull down modules: terraform init
3. Re-attempt your terraform plan or apply and check if the issue still persists

Versions

• Module version [Required]:
  source = "terraform-aws-modules/notify-slack/aws"
  version = "6.5.0"
• Terraform version: 1.11.3

• Provider version(s): 1.11

Reproduction Code [Required]

Steps to reproduce the behavior:
Run by specifying the module. Hardcoded value is python3.11

module "notify_slack" {

source  = "terraform-aws-modules/notify-slack/aws"
version = "~> 6.5.0"

runtime = "python3.13"

}

OR

module "notify_slack" {

source  = "terraform-aws-modules/notify-slack/aws"
version = "~> 6.5.0"

runtime = var.runtime

}

│ Error: Unsupported argument │ │ on main.tf line 37, in module "notify_slack": │ 37: runtime = var.runtime │ │ An argument named "runtime" is not expected here.

Expected behavior

Should be able to update the runtime verison (pythonx.x or nodex.y)

Actual behavior

Terminal Output Screenshot(s)

Additional context

Module terraform-aws-modules/lambda/aws is accepting var.runtime, but not terraform-aws-modules/notify-slack/aws module as the runtime is hardcoded

[antonbabenko]

This PR is included in version 6.7.0 🎉

[github-actions]

I'm going to lock this pull request because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues. If you have found a problem that seems related to this change, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.