request_builder.go: fetcher: Force try HTTP/2

internal/reader/fetcher/request_builder.go

@@ -104,6 +104,8 @@ func (r *RequestBuilder) IgnoreTLSErrors(value bool) *RequestBuilder {
 func (r *RequestBuilder) ExecuteRequest(requestURL string) (*http.Response, error) {
 	transport := &http.Transport{
 		Proxy: http.ProxyFromEnvironment,
+		// Setting `DialContext` disables HTTP/2, this option forces the transport to try HTTP/2 regardless.
+		ForceAttemptHTTP2: true,
 		DialContext: (&net.Dialer{
 			// Default is 30s.
 			Timeout: 10 * time.Second,