capitalization correction

Author: halkazwini

articles/frontdoor/front-door-cdn-comparison.md

@@ -30,7 +30,7 @@ The following table provides a comparison between Azure Front Door and Azure CDN
 | **Delivery and acceleration** | | | | |
 | Static file delivery | ✓ | ✓ | ✓ | ✓ |
 | Dynamic site delivery | ✓ | ✓ | ✓ |  |
-| **Domains and Certs** | | | | |
+| **Domains and certs** | | | | |
 | Custom domains | ✓ - DNS TXT record based domain validation | ✓ - DNS TXT record based domain validation | ✓ - CNAME based validation | ✓ - CNAME based validation |
 | Prevalidated domain integration with Azure PaaS Service | ✓ | ✓ |  |  |
 | HTTPS support | ✓ | ✓ | ✓ | ✓ |