Update hooks

Author: gwangmu

docs/software/container-engine.md

@@ -405,10 +405,14 @@ Container hooks let you customize container behavior to fit system-specific need
 [](){#ref-ce-cxi-hook}
 ### HPE Slingshot interconnect 
 
-```bash
-[annotations]
-com.hooks.cxi.enabled = "true"
-```
+!!! tip
+    On most vClusters, the CXI hook for Slingshot connectivity is enabled implicitly by default or by other hooks.
+    Therefore, entering the enabling annotation in the EDF is unnecessary in many cases.
+
+!!! note "Required annotation"
+    ```bash
+    com.hooks.cxi.enabled = "true"
+    ```
 
 The Container Engine provides a hook to allow containers relying on [libfabric](https://ofiwg.github.io/libfabric/) to leverage the HPE Slingshot 11 high-speed interconnect.
 This component is commonly referred to as the "CXI hook", taking its name from the CXI libfabric provider required to interface with Slingshot 11.
@@ -498,13 +502,17 @@ The hook is activated by setting the `com.hooks.cxi.enabled` annotation, which
     4194304             23925.61
     ```
 
-!!! tip
-    On most vClusters, the CXI hook for Slingshot connectivity is enabled implicitly by default or by other hooks.
-    Therefore, entering the enabling annotation in the EDF is unnecessary in many cases.
-
 [](){#ref-ce-aws-ofi-hook}
 ### AWS OFI NCCL Hook 
 
+!!! note "Required annotation"
+    ```bash
+    com.hooks.aws_ofi_nccl.enabled = "true"
+    com.hooks.aws_ofi_nccl.variant = "cuda12"   # (1)
+    ```
+
+    1. `com.hooks.aws_ofi_nccl.variant` may vary depending on vClusters.
+
 The [AWS OFI NCCL plugin](https://github.com/aws/aws-ofi-nccl) is a software extension that allows the [NCCL](https://developer.nvidia.com/nccl) and [RCCL](https://rocm.docs.amd.com/projects/rccl/en/latest/) libraries to use libfabric as a network provider and, through libfabric, to access the Slingshot high-speed interconnect.
 Also see [NCCL][ref-communication-nccl] and [libfabric][ref-communication-libfabric] for more information on using the libraries on Alps.