fix(ci): remove explicit base/head from TruffleHog scan

On push to main, base (default_branch) and head (HEAD) resolve to the
same commit after checkout, causing TruffleHog to exit with an error.
Omitting base/head lets the action auto-detect the commit range from
the event type (push.before/after or PR base/head SHAs).

Author: cursoragent

.github/workflows/trufflehog.yml

@@ -21,6 +21,4 @@ jobs:
       - uses: trufflesecurity/trufflehog@75add79b929b263dae147d2e5bcf0daf292165cf
         with:
           path: ./
-          base: ${{ github.event.repository.default_branch }}
-          head: HEAD
           extra_args: --only-verified --fail --no-update