nuget-to-json: fix silent error after curl update (#390928)

pkgs/by-name/nu/nuget-to-json/nuget-to-json.sh

@@ -37,7 +37,7 @@ for index in "${sources[@]}"; do
     remote_sources+=("$index")
 
     base_address=$(
-        curl --compressed --netrc -fsL "$index" |
+        curl --compressed --netrc-optional -fsSL "$index" |
             jq -r '.resources[] | select(."@type" == "PackageBaseAddress/3.0.0")."@id"'
     )
     if [[ ! "$base_address" == */ ]]; then