Fix code scanning alert no. 21: Use of Kernel.open or IO.read or …

…similar sinks with a non-constant value

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

config/initializers/database_url.rb

@@ -22,7 +22,7 @@ def self.config_file
   end
 
   def self.db_config
-    config = YAML::load(ERB.new(IO.read(config_file)).result)
+    config = YAML::load(ERB.new(File.read(config_file)).result)
     config[env]
   end