Fixed that up-to-date mods showed up in the updatable section

Author: DeathsGun

src/main/java/xyz/deathsgun/modmanager/services/UpdateCheckService.java

@@ -100,8 +100,9 @@ private ModVersion getUpdateVersion(String modId, ModMetadata container) throws
                 latestVersion = version;
             }
         }
-        if (latest == null) {
+        if (latest == null || installedVersion.compareTo(latestVersion) == 0) {
             logger.info("No update for {} found!", container.getId());
+            return null;
         }
         return latest;
     }