docs: Update URL for HA manifests to stable. (argoproj#24454)

Signed-off-by: Fox Danger Piacenti <[email protected]>

Author: Kelketek

docs/operator-manual/high_availability.md

@@ -2,7 +2,7 @@
 
 Argo CD is largely stateless. All data is persisted as Kubernetes objects, which in turn is stored in Kubernetes' etcd. Redis is only used as a throw-away cache and can be lost. When lost, it will be rebuilt without loss of service.
 
-A set of [HA manifests](https://github.com/argoproj/argo-cd/tree/master/manifests/ha) are provided for users who wish to run Argo CD in a highly available manner. This runs more containers, and runs Redis in HA mode.
+A set of [HA manifests](https://github.com/argoproj/argo-cd/tree/stable/manifests/ha) are provided for users who wish to run Argo CD in a highly available manner. This runs more containers, and runs Redis in HA mode.
 
 !!! note