ci: update deploy-health owner slug to peptide-repo org

Change const owner = 'peptiderepo' → 'peptide-repo' in deploy-health.yml.
This fixes the GitHub API owner ref after the user→org migration so the
monitor correctly queries repos under the peptide-repo org.

All uses:/repository: refs across the estate were already updated at migration
time — this was the sole remaining owner slug ref.

Agent-Session: claude/org-ref-fix-20260617

.github/workflows/deploy-health.yml

@@ -22,7 +22,7 @@ jobs:
       - uses: actions/github-script@v7
         with:
           script: |
-            const owner = 'peptiderepo';
+            const owner = 'peptide-repo';
             const repos = [
               'prautoblogger','peptide-repo-core','peptide-search-ai',
               'peptide-news-plugin','peptide-reconstitution-calculator','peptide-starter-theme'