status: 2023q2: KDE: fixes and minor changes

URL:link:https://⋯ is not valid. Add the necessary space.

The phrase 'The graphics/poppler' should be followed by the word
'port'.

Whilst here:

• make more use of normal paragraphs
• other minor changes.

Approved-by: adridg, salvadore
Fixes: b2678db626 Status/2023Q2/kde.adoc: Add report
Closes: https://github.com/freebsd/freebsd-doc/pull/226
Pull-request: https://github.com/freebsd/freebsd-doc/pull/226