Few issues with the main branch

[Smuger]

Hi Hyperstack Team,

There are a few issues with building the project from the current main branch.

Since the project is in its Alpha stage, you probably already have a completely revamped version that just isn’t live yet.

If not, could you please take a look and let me know if the following changes are correct?

1. Update goreleaser syntax
   Format was renamed to formats, and now accepts a list of formats.
   https://goreleaser.com/deprecations/#archivesformat

2. In the fix_api_spec.py "/core/virtual-machines/{virtual_machine_id}/sg-rules" should be replaced with "/core/virtual-machines/{vm_id}/sg-rules" not "/core/virtual-machines/{id}/sg-rules"

/core/virtual-machines/{virtual_machine_id}/sg-rules
change to
/core/virtual-machines/{vm_id}/sg-rules

3. In the fix_provider_spec.py make sure that attr actually has ["single_nested"]["attributes"]

if attr.get("single_nested", {}).get("attributes"):
    for nested in attr["single_nested"]["attributes"]:
        attr_update_nested(nested, updater)