chore(release): add release notes for 2.40.4 - #2378

Changed pages include:

• index.html - view
• 404.html - view
• continuous-deployment/index.html - view
• contribute/index.html - view
• managed-spin/index.html - view
• plugins/index.html - view
• search/index.html - view
• continuous-deployment/armory-admin/index.html - view
• continuous-deployment/cloud-resources/index.html - view
• continuous-deployment/feature-status/index.html - view

There are more changes not included in the list