Revert "Release 2.21.0 (#2172)" (#2175)

This reverts commit e948ce5.

Author: nkzou

CHANGELOG.md

@@ -1,26 +1,5 @@
 # CHANGELOG
 
-## 2.21.0 / 2024-02-07
-
-### Fixed
-* Add test support for file parameters by @api-clients-generation-pipeline in https://github.com/DataDog/datadog-api-client-java/pull/2150
-* Fix multipart handling by @therve in https://github.com/DataDog/datadog-api-client-java/pull/2155
-* Security Monitoring Suppressions - Make expiration date nullable in update payload by @api-clients-generation-pipeline in https://github.com/DataDog/datadog-api-client-java/pull/2160
-### Added
-* Security Monitoring - Add API support for suppression rules by @api-clients-generation-pipeline in https://github.com/DataDog/datadog-api-client-java/pull/2143
-* Document support for BYDAY in SLO corrections by @api-clients-generation-pipeline in https://github.com/DataDog/datadog-api-client-java/pull/2151
-* Add missing optional field env in DORA API endpoints by @api-clients-generation-pipeline in https://github.com/DataDog/datadog-api-client-java/pull/2152
-* Add compressedProtoFile field to SyntheticsTestRequest by @api-clients-generation-pipeline in https://github.com/DataDog/datadog-api-client-java/pull/2149
-* Add daily limit reset options to logs indexes api by @api-clients-generation-pipeline in https://github.com/DataDog/datadog-api-client-java/pull/2153
-* Add support for API management API by @api-clients-generation-pipeline in https://github.com/DataDog/datadog-api-client-java/pull/2148
-* Add pagination helper for team memberships by @api-clients-generation-pipeline in https://github.com/DataDog/datadog-api-client-java/pull/2163
-* Increase limit on allowed number of graphs in split graph widget by @api-clients-generation-pipeline in https://github.com/DataDog/datadog-api-client-java/pull/2168
-### Deprecated
-* Mark dashboard 'is_read_only' and 'restricted_roles' properties as deprecated by @api-clients-generation-pipeline in https://github.com/DataDog/datadog-api-client-java/pull/2135
-
-
-**Full Changelog**: https://github.com/DataDog/datadog-api-client-java/compare/datadog-api-client-2.20.0...datadog-api-client-2.21.0
-
 ## 2.20.0 / 2024-01-10
 
 ### Added

pom.xml

@@ -4,7 +4,7 @@
     <artifactId>datadog-api-client</artifactId>
     <packaging>jar</packaging>
     <name>datadog-api-client</name>
-    <version>2.21.0</version>
+    <version>2.20.1-SNAPSHOT</version>
     <url>https://github.com/DataDog/datadog-api-client-java</url>
     <description>Java client library for Datadog API</description>
     <scm>