message: add missing Configuration Tags to operationalinsights readme
diff: @@ -43,6 +43,8 @@ directive:
  remove-operation: Query_Get
  ```
  +### Tag: 20171001
  +
  ``` yaml $(tag) == '20171001'
  input-file:
  - Microsoft.OperationalInsights/preview/2017-10-01/swagger.json
  @@ -52,6 +54,8 @@ directive:
  transform: $.operationId = "Query"
  ```
  +### Tag: 20210519
  +
  ``` yaml $(tag) == '20210519'
  input-file:
  - Microsoft.OperationalInsights/preview/2021-05-19_Preview/OperationalInsights.json
  