plantuml: fix sha1 hash

Closes #29905.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
new formula cheat
cheat: update to 2.0.7
cheat: update to 2.0.9
cheat: remove caveats as they're not homebrew-specific
cheat: improve test
cheat: add 2.0.9 bottle.
plantuml: add 7999 bottle.