fix: pass short alias 'stackhawk' to orb-tools/review for RC011 (#26)

RC011 looks up the example orb version via yq '.usage.orbs["<orb_name>"]',
where <orb_name> is the review job's orb_name. We passed the full slug
stackhawk/stackhawk, but the examples key the orb by its alias `stackhawk`, so
the lookup returned null and RC011 failed on the tag (blocking publish). Pass the
short alias `stackhawk` (as orb-tools passes `orb-tools`), matching the example
key. Verified locally with yq.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>