[PATCH docs v2 10/12] ha-manager: rules: improve resource affinity rule short description

[Daniel Kral <d.kral@proxmox.com>]

For conciseness, make the following improvements to the resource
affinity rule short description in a single patch:

- Add newline to separate most important information from additional
  nice-to-have information.
- Use the same order of affinity types as in the separate "Resource
  affinity rules" section.
- Use the word 'must' to highlight that resource affinity rules are
  currently always strict.

Signed-off-by: Daniel Kral <d.kral@proxmox.com>
---
changes since v1:
- new

 ha-manager.adoc | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/ha-manager.adoc b/ha-manager.adoc
index d34916e..479b539 100644
--- a/ha-manager.adoc
+++ b/ha-manager.adoc
@@ -709,10 +709,11 @@ include::generated/ha-rules-opts.adoc[]
 | HA Rule Type        | Description
 | `node-affinity`     | Places affinity from one or more HA resources to one or
 more nodes.
-| `resource-affinity` | Places affinity between two or more HA resources. The
-affinity `negative` specifies that HA resources are to be kept on separate
-nodes, while the affinity `positive` specifies that HA resources are to be kept
-on the same node.
+| `resource-affinity` | Places affinity between two or more HA resources.
+
+The affinity `positive` specifies that HA resources must be kept on the same
+node, while the affinity `negative` specifies that HA resources must be kept on
+separate nodes.
 |===========================================================
 
 [[ha_manager_node_affinity_rules]]
-- 
2.47.3