14.4/relnotes: add additional DTrace provider man pages

dtrace_fbt(4) was included into relnotes due to Relnotes: key word in
the commit. This information is not full, if it does not include reference
to other man pages for dtrace provider created in 14.4R. This patch
adds information about all providers man pages related to this release.

Approved by: re (implicit)
Differential Revision: https://reviews.freebsd.org/D55704