Fix linting

Author: morsapaes

docs/cloud/reference/03_billing/03_clickpipes/clickpipes_for_cdc.md

@@ -3,7 +3,7 @@ sidebar_label: 'PostgreSQL CDC'
 slug: /cloud/reference/billing/clickpipes/postgres-cdc
 title: 'ClickPipes for PostgreSQL CDC'
 description: 'Overview of billing for PostgreSQL CDC ClickPipes'
-doc_type: reference
+doc_type: 'reference'
 ---
 
 # ClickPipes for PostgreSQL CDC {#clickpipes-for-postgresql-cdc}

docs/cloud/reference/03_billing/03_clickpipes/clickpipes_for_streaming_and_object_storage.md

@@ -3,7 +3,7 @@ sidebar_label: 'Streaming and object storage'
 slug: /cloud/reference/billing/clickpipes/streaming-and-object-storage
 title: 'ClickPipes for streaming and object storage'
 description: 'Overview of billing for streaming and object storage ClickPipes'
-doc_type: reference
+doc_type: 'reference'
 ---
 
 import ClickPipesFAQ from '../../../_snippets/_clickpipes_faq.md'

docs/cloud/reference/03_billing/03_clickpipes/index.md

@@ -3,7 +3,7 @@ slug: /cloud/reference/billing/clickpipes
 title: 'ClickPipes'
 description: 'ClickPipes billing'
 keywords: ['ClickPipes Billing']
-doc_type: reference
+doc_type: 'reference'
 ---
 
 :::note