package/syslog-ng: update the upstream URL in Config.in

Update the upstream URL in the help text in Config.in. This
addresses the 'Invalid(Err)' URL status in the package stats
web page output.

Signed-off-by: Mark Corbin <mark@dibsco.co.uk>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/syslog-ng/Config.in

@@ -12,7 +12,7 @@ config BR2_PACKAGE_SYSLOG_NG
 	  of input and output methods: syslog, unstructured text,
 	  queueing, SQL & NoSQL
 
-	  https://syslog-ng.org/
+	  https://www.syslog-ng.com/products/open-source-log-management/
 
 comment "syslog-ng needs a toolchain w/ wchar, threads"
 	depends on BR2_USE_MMU