Update uploaders to use extension_allowlist

Author: asideofcode-dev

app/uploaders/avatar_uploader.rb

@@ -31,7 +31,7 @@ def store_dir
     process resize_to_fit: [178, 65]
   end
 
-  def extension_white_list
+  def extension_allowlist
     %w[jpg jpeg gif png]
   end
 

app/uploaders/image_uploader.rb

@@ -34,9 +34,9 @@ def store_dir
     process resize_to_fit: [1200, 800]
   end
 
-  # Add a white list of extensions which are allowed to be uploaded.
+  # Add an allow list of extensions which are allowed to be uploaded.
   # For images you might use something like this:
-  def extension_white_list
+  def extension_allowlist
     %w[jpg jpeg png]
   end