Merge pull request linode#263 from kwilkins/manager-changelog-0.56.0

Adding changelog for manager 0.56.0

Author: kwilkins

content/changelog/2019/05-08.md

@@ -0,0 +1,23 @@
+---
+title: "0.56.0: 2019-05-08"
+date: "2019-05-08T11:00:00-04:00"
+description: "Cloud Manager Changelog 0.56.0"
+changelog:
+  - Cloud Manager
+version: 0.56.0
+---
+
+### Changed:
+
+- Update Sentry Whitelist URLs
+- Display bucket size using base 2 instead of base 10
+- Update Events Landing in Real-Time
+- Validate Rebuild from Image form before modal opens
+
+### Fixed:
+
+- App crashes when downloading an invoice PDF for unlabeled backups
+- Deploy new Linode from backup
+- Fixing Sentry Errors
+- Prefix Length to the IPv6 Pools and Ranges
+- Pagination Footer numbering