Add new content configuration entry for Astro (#872)

Author: Lehoczky

packages/knip/src/plugins/astro/index.ts

@@ -10,7 +10,7 @@ const enablers = ['astro'];
 
 const isEnabled: IsPluginEnabled = ({ dependencies }) => hasDependency(dependencies, enablers);
 
-const entry = ['astro.config.{js,cjs,mjs,ts}', 'src/content/config.ts'];
+const entry = ['astro.config.{js,cjs,mjs,ts}', 'src/content/config.ts', 'src/content.config.ts'];
 
 const production = [
   'src/pages/**/*.{astro,mdx,js,ts}',