Fix removal of discovery results (openhab#16232)

Signed-off-by: Jacob Laursen <jacob-github@vindvejr.dk>

bundles/org.openhab.binding.boschindego/src/main/java/org/openhab/binding/boschindego/internal/discovery/IndegoDiscoveryService.java

@@ -84,6 +84,6 @@ protected synchronized void stopScan() {
     @Override
     public void dispose() {
         super.dispose();
-        removeOlderResults(Instant.now().getEpochSecond());
+        removeOlderResults(Instant.now().toEpochMilli());
     }
 }