fix the wrong check

npm_and_yarn/lib/dependabot/npm_and_yarn/package_manager.rb

@@ -332,7 +332,7 @@ def package_manager_by_name(name) # rubocop:disable Metrics/PerceivedComplexity
         detected_version = detect_version(name)
 
         # if we have a detected version, we check if it is deprecated or unsupported
-        unless detected_version&.empty?
+        if detected_version && !detected_version.empty?
           package_manager = package_manager_class.new(
             detected_version: detected_version.to_s
           )