Correct minor typo in explain.asciidoc for HLRC
@@ -80,7 +80,7 @@ A typical listener for `ExplainResponse` is constructed as follows:
include-tagged::{doc-tests}/SearchDocumentationIT.java[explain-execute-listener]
--------------------------------------------------
<1> Called when the execution is successfully completed.
-<2> Called when the whole `FieldCapabilitiesRequest` fails.
+<2> Called when the whole `ExplainRequest` fails.
[[java-rest-high-explain-response]]
==== ExplainResponse
