Update resource-hook.md

Author: gwangmu

docs/software/container-engine/resource-hook.md

@@ -31,7 +31,7 @@ This can be done in multiple ways in TOML: for example, both of the following us
 
      * An assignment can implicitly define subtables if the key you assign is a dotted list. As a reference, see the examples made earlier in this section, where assigning a string to the `com.hooks.ssh.enabled` attribute within the `[annotations]` table is exactly equivalent to assigning to the `enabled` attribute within the `[annotations.com.hooks.ssh]` subtable.
 
-     * Attributes can be added to a table only in one place in the TOML file. In other words, each table must be defined in a single square bracket section. See the [TOML format](https://toml.io/en/) spec for more details.
+     * Attributes can be added to a table only in one place in the TOML file. In other words, each table must be defined in a single square bracket section. For example, Case 3 in the example below is invalid because the `ssh` table was doubly defined both in the `[annotations]` and in the `[annotations.com.hooks.ssh]` sections. See the [TOML format](https://toml.io/en/) spec for more details.
 
         ```bash title="Valid"
         [annotations.com.hooks.ssh]
@@ -49,12 +49,10 @@ This can be done in multiple ways in TOML: for example, both of the following us
         [annotations]
         com.hooks.ssh.authorize_ssh_key = "${SCRATCH}/tests/edf/authorized_keys"
 
-        [annotations.com.hooks.ssh]    # (1)
+        [annotations.com.hooks.ssh]
         enabled = "true"
         ```
 
-        1. The `ssh` table was doubly defined both in the `[annotations]` and in the `[annotations.com.hooks.ssh]` sections.
-
 ## Accessing native resources
 
 ### NVIDIA GPUs
@@ -130,9 +128,10 @@ Container hooks let you customize container behavior to fit system-specific need
     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.
 
-```bash title"Required annotation"
-com.hooks.cxi.enabled = "true"
-```
+!!! note "Required annotation"
+    ```console
+    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.
@@ -226,10 +225,13 @@ The hook is activated by setting the `com.hooks.cxi.enabled` annotation, which
 [](){#ref-ce-aws-ofi-hook}
 ### AWS OFI NCCL Hook 
 
-```bash title="Required annotation"
-com.hooks.aws_ofi_nccl.enabled = "true"
-com.hooks.aws_ofi_nccl.variant = "cuda12" 
-```
+!!! note "Required annotation"
+    ```console
+    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. Details below.
 
 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.
@@ -256,12 +258,13 @@ At the moment of writing, 4 plugin variants are configured: `cuda11`, `cuda12`
 [](){#ref-ce-ssh-hook}
 ### SSH Hook
 
-```bash title="Required annotation"
-com.hooks.ssh.enabled = "true"
-com.hooks.ssh.authorize_ssh_key = "<public-key>"    # (1)
-```
+!!! note "Required annotation"
+    ```console
+    com.hooks.ssh.enabled = "true"
+    com.hooks.ssh.authorize_ssh_key = "<public-key>"    # (1)
+    ```
 
-1. Replace `<public-key>` with your SSH public key.
+    1. Replace `<public-key>` with your SSH public key.
 
 !!! warning 
     The `srun` command launching an SSH-connectable container **should set the `--pty` option** in order for the hook to initialize properly.