Sets required providers

[maximillianbrain1]

The required_providers was not set properly in the module. This PR fixes it.

old:

Providers required by configuration:
.
├── provider[registry.terraform.io/rad-security/rad-security] 1.1.3
└── module.rad-security-plugins
    ├── provider[registry.terraform.io/hashicorp/rad-security]
    └── provider[registry.terraform.io/hashicorp/helm]

new:

terraform providers

Providers required by configuration:
.
├── provider[registry.terraform.io/hashicorp/helm] 2.15.0
├── provider[registry.terraform.io/rad-security/rad-security] 1.1.3
└── module.rad-security-plugins
    ├── provider[registry.terraform.io/rad-security/rad-security]
    └── provider[registry.terraform.io/hashicorp/helm]