Apply suggestion from @MichaIng

Remove the STDERR mute from curl command.

The `-s` flag already mutes all curl errors, so STDERR would only contain something if curl itself (or a shared library) is damaged/missing.

Co-authored-by: MichaIng <micha@dietpi.com>
Signed-off-by: RD WebDesign <github@rdwebdesign.com.br>

gravity.sh

@@ -755,7 +755,7 @@ gravity_DownloadBlocklistFromUrl() {
   fi
 
   if [[ "${download}" == true ]]; then
-    curlJson=$(curl --connect-timeout ${curl_connect_timeout} -s -L ${compression:+${compression}} ${customUpstreamResolver:+${customUpstreamResolver}} "${modifiedOptions[@]}" -w "%{json}" "${url}" -o "${listCurlBuffer}" 2>/dev/null)
+    curlJson=$(curl --connect-timeout ${curl_connect_timeout} -s -L ${compression:+${compression}} ${customUpstreamResolver:+${customUpstreamResolver}} "${modifiedOptions[@]}" -w "%{json}" "${url}" -o "${listCurlBuffer}")
   fi
 
   # Retrieve the HTTP code, exit code and error message returned by curl command