add sejong telecom to first table

Author: halkazwini

articles/peering-service/location-partners.md

@@ -46,6 +46,7 @@ The following table provides information on the Peering Service connectivity par
 | [NAP Africa](https://www.napafrica.net/technical/microsoft-azure-peering-service/) | Africa |
 | [NTT Communications](https://www.ntt.com/en/services/network/software-defined-network.html) | Japan, Indonesia |
 | [PCCW](https://www.pccwglobal.com/en/enterprise/products/network/ep-global-internet-access) | Asia |
+| [Sejong Telecom](https://www.sejongtelecom.net/) | Asia |
 | [Singtel](https://www.singtel.com/business/campaign/singnet-cloud-connect-microsoft-direct) | Asia |
 | [Swisscom](https://www.swisscom.ch/en/business/enterprise/offer/wireline/ip-plus.html) | Europe |
 | [Telekom Malaysia](https://www.tm.com.my/) | Asia |