fix: publisher - create versions file correctly (#52)

## Description

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relates to #1234

## Checklist

- [ ] Issue was linked above
- [ ] Code format was applied: `make fmt`
- [ ] Examples were added / adjusted (see `examples/` directory)
- [x] Docs are up-to-date: `make generate-docs` (will be checked by CI)
- [ ] Unit tests got implemented or updated
- [ ] Acceptance tests got implemented or updated (see e.g. [here](f5f99d1709/stackit/internal/services/dns/dns_acc_test.go))
- [x] Unit tests are passing: `make test` (will be checked by CI)
- [x] No linter issues: `make lint` (will be checked by CI)

Reviewed-on: #52
Co-authored-by: Marcel S. Henselin <marcel.henselin@stackit.cloud>
Co-committed-by: Marcel S. Henselin <marcel.henselin@stackit.cloud>

cmd/cmd/publish/provider.go

@@ -143,7 +143,7 @@ func (p *Provider) createVersionsFile() error {
 	// Build the versions file...
 	version := Version{
 		Version:   p.Version,
-		Protocols: []string{"5.1", "6.0"},
+		Protocols: []string{"5.1", "6.1"},
 		Platforms: nil,
 	}
 	for _, sum := range shasums {

cmd/cmd/publish/versions.go

@@ -22,10 +22,14 @@ type Platform struct {
 }
 
 type Data struct {
+	Id       string    `json:"id,omitempty"`
 	Versions []Version `json:"versions"`
 }
 
 func (d *Data) WriteToFile(filePath string) error {
+	// TODO: make it variable
+	d.Id = "tfregistry.sysops.stackit.rocks/mhenselin/stackitprivatepreview"
+
 	jsonString, err := json.Marshal(d)
 	if err != nil {
 		return fmt.Errorf("error encoding data: %w", err)