Fix marketplace showing incompatible add-ons by default (#4182)

Signed-off-by: Jan N. Klug <github@klug.nrw>

bundles/org.openhab.core.addon.marketplace/src/main/java/org/openhab/core/addon/marketplace/AbstractRemoteAddonService.java

@@ -275,7 +275,7 @@ public abstract class AbstractRemoteAddonService implements AddonService {
             Dictionary<String, Object> properties = configuration.getProperties();
             if (properties == null) {
                 // if we can't determine a set property, we use false (default is show compatible only)
-                return true;
+                return false;
             }
             return ConfigParser.valueAsOrElse(properties.get(CONFIG_INCLUDE_INCOMPATIBLE), Boolean.class, false);
         } catch (IOException e) {