[Docs] Update ingest-node.asciidoc (#37116)

Author: adaminspace

docs/reference/ingest/processors/grok.asciidoc

@@ -119,8 +119,8 @@ This pipeline will insert these named captures as new fields within the document
 [[custom-patterns]]
 ==== Custom Patterns
 
-The Grok processor comes pre-packaged with a base set of pattern. These patterns may not always have
-what you are looking for. Pattern have a very basic format. Each entry describes has a name and the pattern itself.
+The Grok processor comes pre-packaged with a base set of patterns. These patterns may not always have
+what you are looking for. Patterns have a very basic format. Each entry has a name and the pattern itself.
 
 You can add your own patterns to a processor definition under the `pattern_definitions` option.
 Here is an example of a pipeline specifying custom pattern definitions: