Typo fix

Solutions/Azure Web Application Firewall (WAF)/Workbooks/WebApplicationFirewallFirewallEvents.json

@@ -146,7 +146,7 @@
       "type": 3,
       "content": {
         "version": "KqlItem/1.0",
-        "query": "AzureDiagnostics\r\n| where  (\"{WAF:lable}\" == \"All\" or Resource in ({WAF}))\r\n| where ResourceType == \"APPLICATIONGATEWAYS\"\r\n| where OperationName == \"ApplicationGatewayFirewall\" \r\n| summarize number = count() by instanceId_s, TimeGenerated\r\n| where instanceId_s has \"role\"\r\n| extend roulenumber = extract(\"ApplicationGateway([a-zA-Z_a-zA-Z_0-9]*)\", 1, instanceId_s) \r\n| project roulenumber , number , TimeGenerated \r\n",
+        "query": "AzureDiagnostics\r\n| where  (\"{WAF:lable}\" == \"All\" or Resource in ({WAF}))\r\n| where ResourceType == \"APPLICATIONGATEWAYS\"\r\n| where OperationName == \"ApplicationGatewayFirewall\" \r\n| summarize number = count() by instanceId_s, TimeGenerated\r\n| where instanceId_s has \"role\"\r\n| extend rolenumber = extract(\"ApplicationGateway([a-zA-Z_a-zA-Z_0-9]*)\", 1, instanceId_s) \r\n| project rolenumber , number , TimeGenerated \r\n",
         "size": 0,
         "exportToExcelOptions": "visible",
         "title": "Role use, by time",