chore: Doc update for changelog v0.9.1-pre.1 (#460)

Author: leofigy

CHANGELOG.md

@@ -1,5 +1,35 @@
 # Changelog
 
+## [v0.9.1-pre.1](https://github.com/mongodb/terraform-provider-mongodbatlas/tree/v0.9.1-pre.1) (2021-05-14)
+[Full Changelog](https://github.com/mongodb/terraform-provider-mongodbatlas/compare/v0.9.0...v0.9.1-pre.1)
+
+**Fixed bugs:**
+
+- mongodbatlas\_cluster bi\_connector state changes on terraform CLI 0.14.2 even without any bi\_connector configuration - terraform 14  [\#364](https://github.com/mongodb/terraform-provider-mongodbatlas/issues/364)
+- Update the CA certificate with a os environment [\#442](https://github.com/mongodb/terraform-provider-mongodbatlas/pull/442) ([pitakill](https://github.com/pitakill))
+
+**Closed issues:**
+
+- New single apply cloud provider access requires encryption\_at\_rest\_provider set in mongodbatlas\_cluster [\#452](https://github.com/mongodb/terraform-provider-mongodbatlas/issues/452)
+- Migration to mongodbatlas\_cloud\_provider\_access\_setup / authorization [\#451](https://github.com/mongodb/terraform-provider-mongodbatlas/issues/451)
+- GCP can't set region for cluster [\#450](https://github.com/mongodb/terraform-provider-mongodbatlas/issues/450)
+- Error verifying GPG signature for provider "mongodbatlas" [\#448](https://github.com/mongodb/terraform-provider-mongodbatlas/issues/448)
+- "CLUSTER\_DISK\_IOPS\_INVALID" related error/unexpected update-in-place [\#439](https://github.com/mongodb/terraform-provider-mongodbatlas/issues/439)
+- encryption\_at\_rest failing with UNEXPECTED ERROR \(and discussion of Cloud Provider Access possible improvement\) [\#409](https://github.com/mongodb/terraform-provider-mongodbatlas/issues/409)
+- Test update - Update test certificate  [\#407](https://github.com/mongodb/terraform-provider-mongodbatlas/issues/407)
+- mongodbatlas\_private\_endpoint and mongodbatlas\_private\_endpoint\_interface\_link not working as expected in version 0.7 [\#406](https://github.com/mongodb/terraform-provider-mongodbatlas/issues/406)
+
+**Merged pull requests:**
+
+- INTMDB-208: Updated docs for upgrading private endpoints [\#458](https://github.com/mongodb/terraform-provider-mongodbatlas/pull/458) ([coderGo93](https://github.com/coderGo93))
+- INTMDB-205 fixing client update side effects [\#456](https://github.com/mongodb/terraform-provider-mongodbatlas/pull/456) ([leofigy](https://github.com/leofigy))
+-  INTMDB-205-client-update bumping the client version up [\#455](https://github.com/mongodb/terraform-provider-mongodbatlas/pull/455) ([leofigy](https://github.com/leofigy))
+- Test config update [\#454](https://github.com/mongodb/terraform-provider-mongodbatlas/pull/454) ([leofigy](https://github.com/leofigy))
+- INTMDB-206 Documentation and example updates [\#453](https://github.com/mongodb/terraform-provider-mongodbatlas/pull/453) ([leofigy](https://github.com/leofigy))
+- updated cluster doc and examples  for the new IOPS change [\#446](https://github.com/mongodb/terraform-provider-mongodbatlas/pull/446) ([nikhil-mongo](https://github.com/nikhil-mongo))
+- fix page title and sidebar [\#445](https://github.com/mongodb/terraform-provider-mongodbatlas/pull/445) ([themantissa](https://github.com/themantissa))
+
+
 ## [v0.9.0](https://github.com/mongodb/terraform-provider-mongodbatlas/tree/v0.9.0) (2021-04-22)
 [Full Changelog](https://github.com/mongodb/terraform-provider-mongodbatlas/compare/v0.9.0-pre.1...v0.9.0)