Update Recent Activity

[adriendupuis]

Question	Answer
JIRA Ticket	IBX-7424, …
Versions	4.6
Edition	Experience, Commerce

• Add note about user privacy.
• Add IP to example.
• Fix group usage: new Criterion\ObjectCriterion(Content::class) doesn't mean that returned entries are all Content, only that returned groups contain one.

Preview: https://ez-systems-developer-documentation--2371.com.readthedocs.build/en/2371/administration/recent_activity/recent_activity/#user-privacy

Checklist

• [ ] Text renders correctly
• [ ] Text has been checked with vale
• [ ] Description metadata is up to date
• [ ] Redirects cover removed/moved pages
• [ ] Code samples are working
• [ ] PHP code samples have been fixed with PHP CS fixer
• [ ] Added link to this PR in relevant JIRA ticket or code PR