update sidecar capacity tables

Author: shalier

articles/aks/istio-scale.md

@@ -29,18 +29,16 @@ The [ClusterLoader2 framework][clusterloader2] was used to determine the maximum
 
 #### Sidecar Capacity and Istiod CPU and Memory
 
-**Azure CNI Overlay**
-
-|   Churn (%) | Churn Rate (sidecars/sec)   |   Sidecar Capacity |   Istiod Memory (GB) |   Istiod CPU |
+|**Azure CNI Overlay**| | | | |
 |-------------|-----------------------------|--------------------|----------------------|--------------|
+|   Churn (%) | Churn Rate (sidecars/sec)   |   Sidecar Capacity |   Istiod Memory (GB) |   Istiod CPU |
 |           0 |--                           |              35000 |                 47.8 |           15 |
 |          25 | 41.7                        |              25000 |                 37.2 |           16 |
 |          50 | 52.1                        |              25000 |                 39.8 |           16 |
 
-**Azure CNI Overlay with Cilium**
-
-|   Churn (%) | Churn Rate (sidecars/sec)   |   Sidecar Capacity |   Istiod Memory (GB) |   Istiod CPU |
+|**Azure CNI Overlay with Cilium**|||||
 |-------------|-----------------------------|--------------------|----------------------|--------------|
+|   Churn (%) | Churn Rate (sidecars/sec)   |   Sidecar Capacity |   Istiod Memory (GB) |   Istiod CPU |
 |           0 |--                           |              30000 |                 41.2 |           15 |
 |          25 | 41.7                        |              25000 |                 36.1 |           16 |
 |          50 | 37.9                        |              25000 |                 42.7 |           16 |