Update readme, remove wget need

Do no longer use wget to download the file, use curl.

Check that curl and jq exists.

Update ReadMe file

download.sh

@@ -9,7 +9,7 @@ curl -s https://api.github.com/repos/go-gitea/gitea/releases/latest |\
 	grep browser_download_url |\
 	cut -d '"' -f 4 |\
 	grep "${arch}$" |\
-	wget -P "${download_folder}" -i -
+	xargs curl -LJO --output-dir "${download_folder}"
 cd - || exit;
 
 # __END__