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-act_runner.sh

@@ -9,7 +9,7 @@ curl -s https://gitea.com/api/v1/repos/gitea/act_runner/releases/latest |\
 	jq ".assets[].browser_download_url" |\
 	cut -d '"' -f 2 |\
 	grep "${arch}$" |\
-	wget -P "${download_folder}" -i -
+	xargs curl -LJO --output-dir "${download_folder}"
 cd - || exit;
 
 # __END__