fix: dump with Konnect is missing Kong version

Recently we made `decK` more aware of the `_format_version` value,
which require fetching the Kong version from Admin API.
This is not possible for Konnect right now, so we just hardcoded
it for `sync`, but missed it for the `dump` command.

This commit is fixing it.

cmd/common_konnect.go

@@ -161,6 +161,7 @@ func dumpKonnectV2(ctx context.Context) error {
 		FileFormat:       file.Format(strings.ToUpper(konnectDumpCmdStateFormat)),
 		WithID:           dumpWithID,
 		RuntimeGroupName: konnectRuntimeGroup,
+		KongVersion:      defaultFetchedKongVersion,
 	})
 }