gems: update bundler-audit to version 0.7.0.1

(#53)
Co-authored-by: depfu[bot] <23717796+depfu[bot]@users.noreply.github.com>

dyndnsd.gemspec

@@ -34,7 +34,7 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency 'rack-tracer', '~> 0.9.0'
 
   s.add_development_dependency 'bundler'
-  s.add_development_dependency 'bundler-audit', '~> 0.6.0'
+  s.add_development_dependency 'bundler-audit', '~> 0.7.0'
   s.add_development_dependency 'rack-test'
   s.add_development_dependency 'rake'
   s.add_development_dependency 'rspec'