tweak NHC docs

Author: sjpb

ansible/roles/nhc/README.md

@@ -21,7 +21,7 @@ To enable node health checks, ensure the `nhc` group contains the `compute` grou
 compute
 ```
 
-This will:
+This will automatically:
 1. Add NHC-related configuration to the `slurm.conf` Slurm configuration file.
 The default configuration is defined in `openhpc_config_nhc`
 (see [environments/common/inventory/group_vars/all/openhpc.yml](../../../environments/common/inventory/group_vars/all/openhpc.yml)).
@@ -75,8 +75,9 @@ to update the autogenerated health checks:
       '^(\s+\S+\s+)\|\|(\s+.*)$'
 
   captures the `TARGET` and `||` separator as `\1` and the actual check as `\2`.
-  Hence - as an example only - the following comments-out checks on a
-  specific interface for all nodes:
+  For example the following configuration will comment-out checks for a
+  specific interface for all nodes - in reality using `state: absent` would be
+  better if the check is not required, but this shows the regex syntax:
 
   ```yaml
   nhc_config_changes: