Merge pull request #279995 from MrRoundRobin/patch-3

Fix Table in vpn-gateway-about-vpn-devices.md

Author: prmerger-automator[bot]

articles/vpn-gateway/vpn-gateway-about-vpn-devices.md

@@ -144,6 +144,7 @@ In the following tables:
 
 MSS clamping is done bidirectionally on the Azure VPN Gateway. The following table lists the packet size under different scenarios. 
 | **Packet Flow**               |**IPv4**        | **IPv6**   |
+| ---                           | ---            | ---        |
 | Over Internet                 | 1340 bytes     | 1360 bytes |
 | Over Express Route Gateway    | 1250 bytes     | 1250 bytes |