Review docs after updating the title of the Rule Management page

[alainnahalliday]

Description

We updated the Rule Management page title from "Rules" to "Detection rules (SIEM)" in this PR.

Please check if any documentation needs to be updated accordingly - mentions of the page, screenshots.

Related links / assets

Please include each of the following, if applicable:
Github issue link(s): elastic/kibana#247330
How to find the text in a production environment: Navigate to Security > Rules > Detection rules (SIEM)

NOTE: To keep sensitive information such as credentials secure, do not include it in this form.

Which product area does this mainly concern?

Security solution

Collaborators

PM:
Designer:
Developer: @alainnahalliday
Others (if applicable):

Timeline / deliverables

Not urgent at all.