PMM-14081 fix typo (#4537)

Author: BupycHuk

managed/services/agents/azure_database.go

@@ -64,7 +64,7 @@ func azureDatabaseExporterConfig(exporter *models.Agent, service *models.Service
 	case models.MySQLServiceType:
 		resourceTypes = `    resource_types:
       - "Microsoft.DBforMySQL/servers"
-      - "Microsoft.DBforMySQL/felexibleServers"
+      - "Microsoft.DBforMySQL/flexibleServers"
       - "Microsoft.DBforMariaDB/servers"`
 	case models.PostgreSQLServiceType:
 		resourceTypes = `    resource_types:

managed/services/agents/azure_database_test.go

@@ -95,7 +95,7 @@ resource_groups:
       - Average
     resource_types:
       - "Microsoft.DBforMySQL/servers"
-      - "Microsoft.DBforMySQL/felexibleServers"
+      - "Microsoft.DBforMySQL/flexibleServers"
       - "Microsoft.DBforMariaDB/servers"
     metrics:
       - name: "cpu_percent"