Doc: minor (#10627)

### What problem does this PR solve?


### Type of change


- [x] Documentation Update

docs/guides/agent/agent_component_reference/parser.md

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+---
+sidebar_position: 30
+slug: /parser_component
+---
+
+# Message component
+
+A component that sets the parsing rules for your dataset.
+
+---
+
+A **Parser** component sets the parsing rules for various file types, including parsing methods for PDFs , fields to parse for Emails, and OCR methods for images.
+
+
+## Scenario
+
+An **parser** component is auto-populated on the ingestion pipeline canvase and always required in an ingestion pipeline workflow.