Fix labels config syntax

Author: breezewish

content/docs/6.1/deploy/configure/topology.md

@@ -45,7 +45,7 @@ Assume that the topology has three layers: `zone > rack > host`. You can set a l
 
     ```toml
     [server]
-    labels = "zone=<zone>,rack=<rack>,host=<host>"
+    labels = {zone="<zone>",rack="<rack>",host="<host>"}
     ```
 
 ## Example

content/docs/6.5/deploy/configure/topology.md

@@ -45,7 +45,7 @@ Assume that the topology has three layers: `zone > rack > host`. You can set a l
 
     ```toml
     [server]
-    labels = "zone=<zone>,rack=<rack>,host=<host>"
+    labels = {zone="<zone>",rack="<rack>",host="<host>"}
     ```
 
 ## Example

content/docs/7.1/deploy/configure/topology.md

@@ -45,7 +45,7 @@ Assume that the topology has three layers: `zone > rack > host`. You can set a l
 
     ```toml
     [server]
-    labels = "zone=<zone>,rack=<rack>,host=<host>"
+    labels = {zone="<zone>",rack="<rack>",host="<host>"}
     ```
 
 ## Example

content/docs/dev/deploy/configure/topology.md

@@ -45,7 +45,7 @@ Assume that the topology has three layers: `zone > rack > host`. You can set a l
 
     ```toml
     [server]
-    labels = "zone=<zone>,rack=<rack>,host=<host>"
+    labels = {zone="<zone>",rack="<rack>",host="<host>"}
     ```
 
 ## Example