docs: add changelog entry for v4.11.0

Author: Jeremy Udit

CHANGELOG.md

@@ -1,8 +1,16 @@
-## Unreleased
+## 4.11.0 (Jun 7, 2021)
 
 BREAKING CHANGES:
 
-- Allow GitHub App PEM data to be passed directly ([#803](https://github.com/integrations/terraform-provider-github/issues/803))
+- Allow PEM data to be passed directly for GitHub App provider authentication ([#803](https://github.com/integrations/terraform-provider-github/issues/803))
+
+ENHANCEMENTS:
+
+- Add `encrypted_value` field to `github_actions_secret` and `github_actions_organization_secret` resources ([#807](https://github.com/integrations/terraform-provider-github/issues/807))
+
+BUG FIXES:
+
+- Fix error handling when branch does not exist for `github_branch` resource ([#806](https://github.com/integrations/terraform-provider-github/issues/806))
 
 ## 4.10.1 (May 25, 2021)