Add details to change-rule description (#671)

Signed-off-by: Praveen Rewar <[email protected]>

site/content/kapp/docs/v0.58.x/apply-ordering.md

@@ -24,7 +24,7 @@ Additionally kapp allows to customize order of changes via following resource an
 - `kapp.k14s.io/change-group` annotation to group one or more resource changes into arbitrarily named group. Example: `apps.big.co/db-migrations`. You can specify multiple change groups by suffixing each annotation with a `.x` where `x` is unique identifier (e.g. `kapp.k14s.io/change-group.istio-sidecar-order`).
 - `kapp.k14s.io/change-rule` annotation to control when resource change should be applied (created, updated, or deleted) relative to other changes. You can specify multiple change rules by suffixing each annotation with a `.x` where `x` is unique identifier (e.g. `kapp.k14s.io/change-rule.istio-sidecar-order`).
 
-`kapp.k14s.io/change-rule` annotation value format is as follows: `(upsert|delete) (after|before) (upserting|deleting) <name>`. For example:
+`kapp.k14s.io/change-rule` annotation value format is as follows: `(upsert|delete) (after|before) (upserting|deleting) <name>` where `<name>` is change-group of the relative change. For example:
 
 - `kapp.k14s.io/change-rule: "upsert after upserting apps.big.co/db-migrations"`
 - `kapp.k14s.io/change-rule: "delete before upserting apps.big.co/service"`