Correction of 'operational state' in Doc: use-the-always-on-dashboard-sql-server-management-studio.md

Mistake in the doc for operational states which say its for secondray replica but its not as per the doc sys.dm_hadr_availability_replica_states.

Corrected the doc and updated the operational states as per the given doc --- https://learn.microsoft.com/en-us/sql/relational-databases/system-dynamic-management-views/sys-dm-hadr-availability-replica-states-transact-sql?view=azuresqldb-current#:~:text=operational_state_desc

Author: ghkhan89

docs/database-engine/availability-groups/windows/use-the-always-on-dashboard-sql-server-management-studio.md

@@ -156,16 +156,15 @@ The **Availability replica** pane displays the following columns:
 -   **Connected**. A remote availability replica that is currently connected to the local replica.  
 
  **Operational State**  
- Indicates the current operational state of the secondary replica. This value is hidden by default. The possible values are:  
+ Indicates the current operational state of the replica. This value is hidden by default. The possible values are:  
 
  **0**. Pending failover    
  **1**. Pending    
  **2**. Online    
  **3**. Offline   
  **4**. Failed    
- **5**. Failed, no quorum  
-  
- **NULL**. Replica is not local  
+ **5**. Failed, no quorum    
+ **NULL/Unknown**. Replica is not local    
 
  **Last Connection Error No.**  
  Number of the last connection error.  This value is hidden by default.