Merge pull request #2536 from codebar/dependabot/bundler/sitemap_generator-7479883

chore(deps): bump sitemap_generator from `2b4fc4b` to `7479883`

Author: mroderick

Gemfile.lock

@@ -1,6 +1,6 @@
 GIT
   remote: https://github.com/kjvarga/sitemap_generator.git
-  revision: 2b4fc4b138e70b675a1eaef62f45d6024f1cb705
+  revision: 747988328566c84b0b8aa1ab898ababc371284dc
   branch: master
   specs:
     sitemap_generator (6.4.0)