Invalid filter expression in DataSourcesListByWorkspace

Ref:

https://github.com/Azure/azure-rest-api-specs/blob/main/specification/operationalinsights/resource-manager/Microsoft.OperationalInsights/stable/2020-08-01/examples/DataSourcesListByWorkspace.json

"$filter": "kind='WindowsEvent'",

This is not valid. I make the call with AZ REST (for the sake of simplicity):

https://management.azure.com/subscriptions/e36582a6-9e0c-4644-9b78-592ffe29a705/resourcegroups/defaultresourcegroup-eus/providers/Microsoft.OperationalInsights/workspaces/Workspace-be596052-ca5c-4643-a5c0-c3aae3e7a
f13-EUS/dataSources?$filter=kind='LinuxPerformanceObject'&api-version=2020-08-01

And what I get back is:

az : ERROR: Bad Request({"error":{"code":"KindNotSpecified","message":"Must specify a valid kind filter. For example, $filter=kind eq 'windowsPerformanceCounter'."}})

I Oblige the error message and switch to 'eq' and it goes well:

https://management.azure.com/subscriptions/e36582a6-9e0c-4644-9b78-592ffe29a705/resourcegroups/defaultresourcegroup-eus/providers/Microsoft.OperationalInsights/workspaces/Workspace-be596052-ca5c-4643-a5c0-c3aae3e7a
f13-EUS/dataSources?$filter=kind eq 'LinuxPerformanceObject'&api-version=2020-08-01

I was sent on this wrong path by our official documentation, which is apparently based off the aforementioned API definition file:

https://learn.microsoft.com/en-us/rest/api/loganalytics/data-sources/list-by-workspace?tabs=HTTP

Start with specification/operationalinsights/resource-manager/Microsoft.OperationalInsights/stable/2020-08-01/examples/DataSourcesListByWorkspace.json and compare its $filter syntax with the error message and working request in the issue. Update the example so it uses the accepted expression, then verify the linked REST documentation reflects the corrected example.

Written by the indexing model from the issue text.