Set flexible blocks package version

Author: sten

composer.json

@@ -26,7 +26,7 @@
         "spatie/laravel-missing-page-redirector": "^2.11",
         "spatie/laravel-package-tools": "^1.16",
         "spatie/laravel-sitemap": "^7.3",
-        "statikbe/laravel-filament-flexible-content-blocks": "dev-main"
+        "statikbe/laravel-filament-flexible-content-blocks": "^2.6"
     },
     "require-dev": {
         "larastan/larastan": "^2.9||^3.0",