bootstrap-depends nitpick: warn about rm -rf ~/.local

Some people might get surprised, as it's the default location for quite
some data nowadays ($XDG_DATA_HOME).
5 jobs from bootstrap-depends in 30 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
canceled #72981
docker linux amd64
build:linux:amd64

passed #19904
docker linux amd64
build:linux:amd64

00:00:34

 
  Test
passed #19906
docker linux amd64
deckard:linux:amd64

00:00:30

canceled #19907
docker linux amd64 allowed to fail
respdiff:linux:amd64

00:00:09

passed #19905
docker linux amd64
test:linux:amd64

00:00:20