Fix potential deadlock retrieving results (#1941)

Signed-off-by: Fernando Cainelli <fernando.cainelli@getyourguide.com>
Co-authored-by: Peter Grant <117960526+franknstyle@users.noreply.github.com>

pkg/client/retrieve.go

@@ -60,6 +60,7 @@ func (c *SonobuoyClient) RetrieveResults(cfg *RetrieveConfig) (io.Reader, <-chan
  ec := make(chan error, 1)
  client, err := c.Client()
  if err != nil {
+ ec <- err
  return nil, ec, nil
  }