ScanConsistency should be SearchScanConsistency in docs

@cbftsopts
In the documentation on [Searching with the SDK using Consistency](https://docs.couchbase.com/dotnet-sdk/current/howtos/full-text-searching-with-sdk.html#consistency) the example for consistency says `options.WithConsistency(ScanConsistency.RequestPlus);`but "WithConsistency" and "ScanConsistency" both give compile errors. When I checked the API docs I found options.ScanConsistency(SearchScanConsistency), is this functionally the same as the example shown?