quail/py-b5: Use U+3007 for ideographic zero (bug#3179)

* leim/leim-ext.el ("quail/PY-b5"): Use U+3007 instead of U+25CB for
ideographic zero.  U+25CB (used previously) is only one of the several
lookalikes (bug#3179).
1 job for master in 90 minutes and 2 seconds (queued for 3 seconds)
Status Job ID Name Coverage
failed #3814


Name Stage Failure
test-all Test The script exceeded the maximum execution time set for the job
  GEN      lisp/eshell/eshell-tests.log
ELC lisp/faces-tests.elc
GEN lisp/faces-tests.log
ELC lisp/ffap-tests.elc
GEN lisp/ffap-tests.log
ELC lisp/filenotify-tests.elc
GEN lisp/filenotify-tests.log
Pulling docker image gitlab/gitlab-runner-helper:x86_64-d0b76032 ...
ERROR: Job failed: execution took longer than 1h30m0s seconds