Show two rows of applicants on the homepage

Bump the homepage «کادر درمان آماده به کار» section from 3 to 6 latest talent listings, so it fills
two rows of the grid-3 instead of one.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/JobsMedical.Web/Pages/Index.cshtml.cs

@@ -52,7 +52,7 @@ public class IndexModel : PageModel
             .Where(t => t.Status == ShiftStatus.Open
                 && t.CreatedAt >= JobsMedical.Web.Services.Scraping.ListingPolicy.TalentCutoffUtc)
             .OrderByDescending(t => t.CreatedAt)
-            .Take(3)
+            .Take(6)   // two rows of the grid-3 «آماده به کار» section
             .ToListAsync();
 
         Cities = await _db.Cities.Where(c => c.IsActive).OrderBy(c => c.Name).ToListAsync();