Generate files for 1.5.12 release

Author: hc-github-team-nomad-core

.release/ci.hcl

@@ -7,7 +7,7 @@ project "nomad" {
   team = "nomad"
 
   slack {
-    notification_channel = "C03B5EWFW01"
+    notification_channel = "CUYKT2A73"
   }
 
   github {

CHANGELOG.md

@@ -1,3 +1,14 @@
+## 1.5.12 (December 13, 2023)
+
+BUG FIXES:
+
+* cli: Fix a bug in the `var put` command which prevented combining items as CLI arguments and other parameters as flags [[GH-19423](https://github.com/hashicorp/nomad/issues/19423)]
+* client: remove incomplete allocation entries from client state database during client restarts [[GH-16638](https://github.com/hashicorp/nomad/issues/16638)]
+* connect: Fixed a bug where deployments would not wait for Connect sidecar task health checks to pass [[GH-19334](https://github.com/hashicorp/nomad/issues/19334)]
+* consul: uses token namespace to fetch policies for verification [[GH-18516](https://github.com/hashicorp/nomad/issues/18516)]
+* csi: Added validation to `csi_plugin` blocks to prevent `stage_publish_base_dir` from being a subdirectory of `mount_dir` [[GH-19441](https://github.com/hashicorp/nomad/issues/19441)]
+* metrics: Revert upgrade of `go-metrics` to fix an issue where metrics from dependencies, such as raft, were no longer emitted [[GH-19376](https://github.com/hashicorp/nomad/issues/19376)]
+
 ## 1.5.11 (December 07, 2023)
 
 BREAKING CHANGES: