The `DeflateStream.Flush()` implementation DOES have functionality on .net 10

### Type of issue

Other (describe below)

### Description

The documentation claims `DeflateStream.Flush()` has no functionality. The actual source code disagrees with what very much looks like an implementation that calls `FlushBuffers()` when compressing:

https://github.com/dotnet/runtime/blob/5eaa18a9f3398d54ba9b8c0974d88171663be892/src/libraries/System.IO.Compression/src/System/IO/Compression/DeflateZLib/DeflateStream.cs#L197

### Page URL

https://learn.microsoft.com/en-us/dotnet/api/system.io.compression.deflatestream.flush?view=net-10.0

### Content source URL

https://github.com/dotnet/dotnet-api-docs-temp/blob/live/xml/System.IO.Compression/DeflateStream.xml

### Document Version Independent Id

29d985b1-155e-04b5-be13-201d0947559e

### Platform Id

94f3b4d6-9c3c-4d04-bc2e-1debbe55ab55

### Article author

@dotnet-bot

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[Associated WorkItem - 589897](https://dev.azure.com/msft-skilling/Content/_workitems/edit/589897)