docs: fix misspellings

packaging/cfg/taos.cfg

@@ -20,16 +20,16 @@
 # secondEp
 
 
-############### 2. Configuration Parameters of current dndoe #####
+############### 2. Configuration Parameters of current dnode #####
 
-# The FQDN of the host on which this dndoe will be started. It can be IP address
+# The FQDN of the host on which this dnode will be started. It can be IP address
 # fqdn                      hostname
 
 # The port for external access after this dnode is started     
 # serverPort                6030
 
 # The maximum number of connections a dnode can accept
-# maxShellConns         5000
+# maxShellConns             5000
 
 # The directory for writing log files, if you are using Windows platform please change to Windows path
 # logDir                    /var/log/taos