chore: fix change detection when there is a single registry source as…

… an input (#1218)

Also fixes speakeasy's internal regression tests, once the next
generation happens, for any affected repos. Will require 1 generation to
fix bad data in workflow.lock first.

internal/run/sourceTracking.go

@@ -159,6 +159,8 @@ func (w *Workflow) snapshotSource(ctx context.Context, parentStep *workflowTrack
 		if err != nil {
 			return err
 		}
+
+		namespaceName = document.NamespaceName
 		w.lockfile.Sources[sourceID] = workflow.SourceLock{
 			SourceNamespace:      namespaceName,
 			SourceRevisionDigest: document.ManifestDigest,