[albertoramosmonagas]

What type of PR is this?

Add one of the following kinds:

• documentation

What this PR does / why we need it:

The "SIM swap" definition in sim-swap-subscriptions.yaml was the older, shorter version. sim-swap.yaml has the extended definition (multisim, change of operator, new subscription). This PR:

1. Copies the extended definition verbatim into sim-swap-subscriptions.yaml, so both specs share the same wording.
2. Clarifies, in both specs, that "new subscription" means a new mobile subscription (a new line). In the Subscriptions API, "subscription" also means the event subscription resource, so the original wording could be ambiguous. The sentence is also split with a colon and "can be used" becomes "may have been used".

Documentation-only changes in info.description; no impact on the API surface.

Which issue(s) this PR fixes:

Fixes #324

Special notes for reviewers:

The change targets the next meta-release; the Sync26 public release (r4.3) is already closed.

Changelog input

 release-note
Align the "SIM swap" definition in the SIM Swap Subscriptions API with the SIM Swap API, and clarify "new subscription" as a new mobile line in both (documentation only)

[bigludo7]

LGTM