Update documentation to indicate that ProtoInfo should be used instead of the legacy .proto. provider.
RELNOTES: None.
@@ -137,7 +137,7 @@ public final class BazelProtoLibraryRule implements RuleDefinition {
<p>It only contains information about the <code>.proto</code> files directly mentioned by a
<code>proto_library</code> rule; the collection of transitive descriptor sets is available through
-the <code>proto.transitive_descriptor_sets</code> Skylark provider.
+the <code>[ProtoInfo].transitive_descriptor_sets</code> Skylark provider.
See documentation in <code>ProtoInfo.java</code>.</p>
<p>Recommended code organization:</p>
