This is needed to make builds on Arch work again.

Add a reminder to upgrade packages and add a line break to improve
readability (make a line code as code appearance).

Fix - Punctuations

See merge request jwilkes/purr-data!614

Not sure what this was used for. Could have been a remnant from ancient
Pd-extended builds where libdl was required to dynamically load at all,
but that's a shot in the dark.

Anyway, if we get reports in a future release of some external randomly
refusing to load under Windows, we may want to test whether this change
is the culprit.