Add Fleet & Agent 8.11.3 Release Notes

docs/en/ingest-management/release-notes/release-notes-8.11.asciidoc

@@ -14,6 +14,7 @@
 
 This section summarizes the changes in each release.
 
+* <<release-notes-8.11.3>>
 * <<release-notes-8.11.2>>
 * <<release-notes-8.11.1>>
 * <<release-notes-8.11.0>>
@@ -23,6 +24,41 @@ Also see:
 * {kibana-ref}/release-notes.html[{kib} release notes]
 * {beats-ref}/release-notes.html[{beats} release notes]
 
+// begin 8.11.3 relnotes
+
+[[release-notes-8.11.3]]
+== {fleet} and {agent} 8.11.3
+
+Review important information about {fleet-server} and {agent} for the 8.11.3 release.
+
+[discrete]
+[[enhancements-8.11.3]]
+=== Enhancements
+
+{fleet}::
+//* Improve UX for policy secrets. {kibana-pull}171405[#171405]
+
+{agent}::
+//* Add configuration parameters for the Kubernetes `leader_election` provider. {agent-pull}3625[#3625]
+//* Update NodeJS version bundled with Heartbeat to v18.18.2. {agent-pull}3655[#3655]
+//* Update Go version to 1.20.11. {agent-pull}3748[#3748]
+
+[discrete]
+[[bug-fixes-8.11.3]]
+=== Bug fixes
+
+{fleet}::
+//* Support integration secrets in a local package registry with variables `secret: true` and `required: false`. {kibana-pull}172078[#172078]
+//* Fix agent metrics retrieval on the agent list page, previously displaying N/A for metrics for users with more than 10 agents. {kibana-pull}172016[#172016]
+//* Only add `time_series_metric` if TSDB is enabled. {kibana-pull}171712[#171712]
+//* Fix inability to upgrade agents from version 8.10.4 to version 8.11. {kibana-pull}170974[#170974]
+
+{agent}::
+//* Fix logging calls that have missing arguments. {agent-pull}3679[#3679]
+//* Fix {fleet}-managed {agent} ignoring the `agent.download.proxy_url` setting after a policy is updated. {agent-pull}3803[#3803] {agent-issue}3560[#3560]
+//* Properly convert component error fields to YAML in agent diagnostics. {agent-pull}3835[#3835] {agent-issue}2940[#2940]
+
+// end 8.11.3 relnotes
 
 // begin 8.11.2 relnotes