Merge pull request BrentOzarULTD#3185 from codykonior/patch-3

Update check for managed instances

Author: BrentOzar

sp_BlitzFirst.sql

@@ -1131,7 +1131,7 @@ BEGIN
            @StockDetailsFooter = @StockDetailsFooter + @LineFeed + ' -- ?>';
 
     /* Get the instance name to use as a Perfmon counter prefix. */
-    IF SERVERPROPERTY('EngineEdition') = 5 /*CAST(SERVERPROPERTY('edition') AS VARCHAR(100)) = 'SQL Azure'*/
+    IF SERVERPROPERTY('EngineEdition') IN (5, 8) /*CAST(SERVERPROPERTY('edition') AS VARCHAR(100)) = 'SQL Azure'*/
         SELECT TOP 1 @ServiceName = LEFT(object_name, (CHARINDEX(':', object_name) - 1))
         FROM sys.dm_os_performance_counters;
     ELSE