ci: use INFO=true for weekly linting (#526)

This adds back `info` messages for the weekly linting report, see
leanprover-community/mathlib-ci#23 for more
context.

Author: chenson2018

.github/workflows/weekly-lints.yml

@@ -58,6 +58,7 @@ jobs:
         SHA=${{ github.sha }} \
         REPO=${{ github.repository }} \
         RUN_ID=${{ github.run_id }} \
+        INFO=true \
           "${CI_SCRIPTS_DIR}/reporting/zulip_build_report.sh" "${lean_outfile}" > "${GITHUB_OUTPUT}"
 
     - name: Post output to Zulip