The app-changelog.md files that are generated by git-chglog are not
being constrained tightly enough to specific branches to present useful
changelogs. For example, the plex-12.0.10..plex-12.0.11 changelog link
to GitHub points to the comparison between
plex-utills-3.0.9..plex-12.0.11.
Using -\d+\.\d+\.\d+ as the tag name suffix seems safe since the version
numbers are under this project's control.
Signed-off-by: Dan Christensen <opello@opello.org>