[DOCS] Fix links broken in commit 69a60a6 (#3741)

Author: jrodewig

src/Tests/Tests/high-level.asciidoc

@@ -118,8 +118,8 @@ on using the {ref_current}/search-search.html[Search API].
 NEST exposes a number of important features for indexing documents into Elasticsearch.
 
 - <<indexing-documents, Indexing Documents>>
-- <<ingest-pipelines, Ingest Pipelines>>
-- <<ingest-node, Ingest Node>>
+- <<pipelines, Ingest Pipelines>>
+- <<ingest-nodes, Ingest Node>>
 
 include::{output-dir}/indexing/indexing-documents.asciidoc[]
 include::{output-dir}/indexing/ingest-node.asciidoc[]