docs: add support for version 4 Filament Pennant feature flags

Author: maartenpaauw

content/plugins/maartenpaauw-pennant.md

@@ -7,9 +7,11 @@ description: Seamlessly integrate feature flags from Laravel Pennant into Filame
 anystack_id: 99ea0c8c-ad09-42eb-a524-e17514543ddc
 discord_url: https://discord.com/channels/883083792112300104/1145610616552300595
 github_repository: maartenpaauw/pennant-for-filament
-docs_url: https://raw.githubusercontent.com/maartenpaauw/pennant-for-filament-docs/main/README.md
+docs_urls:
+  v4: https://raw.githubusercontent.com/maartenpaauw/pennant-for-filament-docs/main/README.md
+  v3: https://raw.githubusercontent.com/maartenpaauw/pennant-for-filament-docs/refs/heads/1.x/README.md
 has_dark_theme: true
 has_translations: true
-versions: [3]
+versions: [3, 4]
 publish_date: 2023-08-21
 ---