Fix auto-generated link to the Java Future interface

[alicejli]

The auto-generated link to the Java Future interface is broken: https://cloud.google.com/java/docs/reference/api-common/latest/com.google.api.core.ApiFuture (https://screenshot.googleplex.com/5GuhfNcyr23uDvf)

https://github.com/googleapis/java-docfx-doclet/blob/main/third_party/docfx-doclet-143274/src/main/java/com/microsoft/build/ReferenceBuilder.java#L132 needs to be updated to ignore generic parameters.

See b/355236843 for more context.