missing error check in discovery

plugin/discovery/get.go

@@ -204,6 +204,9 @@ func (i *ProviderInstaller) Get(provider string, req Constraints) (PluginMeta, t
 	}
 
 	downloadURLs, err := i.listProviderDownloadURLs(providerSource, versionMeta.Version)
+	if err != nil {
+		return PluginMeta{}, diags, err
+	}
 	providerURL := downloadURLs.DownloadURL
 
 	if !i.SkipVerify {