Merge pull request #252341 from kinghorn/patch-9

Update prometheus-api-promql.md

Author: prmerger-automator[bot]

articles/azure-monitor/essentials/prometheus-api-promql.md

@@ -193,6 +193,7 @@ The following limitations are in addition to those detailed in the Prometheus sp
 
 + Query must be scoped to a metric  
     Any time series fetch queries (/series or /query or /query_range) must contain a \_\_name\_\_ label matcher. That is, each query must be scoped to a metric. There can only be one \_\_name\_\_ label matcher in a query.
++ Query /series does not support regular expression filter
 + Supported time range  
     + /query_range API supports a time range of 32 days. This is the maximum time range allowed, including range selectors specified in the query itself.
     For example, the query `rate(http_requests_total[1h]` for last the 24 hours would actually mean data is being queried for 25 hours. This comes from the 24-hour range plus the 1 hour specified in query itself.