[network] Fix NumberFormatException for ping when locale has comma as decimal separator (#16636)

* fixing bug:
LatencyParser fails to parse ping times on systems with comma (,) set as decimal separator

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

bundles/org.openhab.binding.network/src/main/java/org/openhab/binding/network/internal/utils/LatencyParser.java

@@ -55,7 +55,7 @@ public class LatencyParser {
 
         Matcher m = LATENCY_PATTERN.matcher(inputLine);
         if (m.find() && m.groupCount() == 1) {
-            return millisToDuration(Double.parseDouble(m.group(1)));
+            return millisToDuration(Double.parseDouble(m.group(1).replace(",", ".")));
         }
 
         logger.debug("Did not find a latency value");