Release datadog-checks-base (DataDog#21477)

* [Release] Bumped datadog_checks_base version to 37.21.0

* [Release] Update metadata

Author: Kyle-Neale

.in-toto/tag.bd79a691.link

@@ -2,6 +2,14 @@
 
 <!-- towncrier release notes start -->
 
+## 37.21.0 / 2025-09-30
+
+***Added***:
+
+* Bump Python to 3.13 ([#21161](https://github.com/DataDog/integrations-core/pull/21161))
+* Add DatabaseCheck base class for database integrations ([#21202](https://github.com/DataDog/integrations-core/pull/21202))
+* Add tag normalization support to TagManager with optional tag_normalizer parameter and normalize flags for set_tag/set_tags_from_list/delete_tag methods. ([#21474](https://github.com/DataDog/integrations-core/pull/21474))
+
 ## 37.20.0 / 2025-09-17
 
 ***Added***:

datadog_checks_base/CHANGELOG.md

@@ -1,4 +1,4 @@
 # (C) Datadog, Inc. 2018-present
 # All rights reserved
 # Licensed under a 3-clause BSD style license (see LICENSE)
-__version__ = "37.20.0"
+__version__ = "37.21.0"

datadog_checks_base/changelog.d/21161.added

@@ -30,7 +30,7 @@ datadog-celery==2.0.1
 datadog-ceph==4.1.0; sys_platform != 'win32'
 datadog-cert-manager==6.0.1
 datadog-checkpoint-quantum-firewall==1.0.0
-datadog-checks-base==37.20.0
+datadog-checks-base==37.21.0
 datadog-checks-dependency-provider==3.0.0
 datadog-checks-downloader==8.0.0
 datadog-cilium==6.0.1