Bump Agent version following 7.21 release (#23321)

Signed-off-by: Vincent Boulineau <vincent.boulineau@datadoghq.com>

stable/datadog/CHANGELOG.md

@@ -1,5 +1,9 @@
 # Datadog changelog
 
+## 2.3.36
+
+* Bump default Agent version to `7.21.1`
+
 ## 2.3.35
 
 * Add support for configuring the Datadog Admission Controller

stable/datadog/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: datadog
-version: 2.3.35
+version: 2.3.36
 appVersion: "7"
 description: Datadog Agent
 keywords:

stable/datadog/values.yaml

@@ -667,7 +667,7 @@ agents:
     ## Define the Agent version to use.
     ## Use 7-jmx to enable jmx fetch collection
     #
-    tag: 7.20.2
+    tag: 7.21.1
 
     ## @param doNotCheckTag - boolean - optional
     ## By default, the version passed in agents.image.tag is checked