840: Fix configuration name in dependency filtering section

[big-andy-coates]

Fixes: #840

With Gradle 8.0.2 (not tried other versions) the configuration name is runtimeClasspath not RuntimeClasspath. Using the latter results in an empty set of dependencies being reported (as it matches no configurations).

[bigdaz]

Thanks! Although in theory a user could define a configuration named RuntimeClasspath and then want to exclude other dependencies, that's clearly not what I was intending here :).