use slug by default

app/models/concerns/with_github_files.rb

@@ -14,7 +14,7 @@ module WithGithubFiles
   end
 
   def github_path_generated
-    "_#{self.class.name.demodulize.pluralize.underscore}/#{self.id}.html"
+    "_#{self.class.name.demodulize.pluralize.underscore}/#{self.slug}.html"
   end
 
   def to_jekyll(github_file)

app/models/research/researcher.rb

@@ -36,9 +36,4 @@ class Research::Researcher < ApplicationRecord
   def to_s
     "#{ first_name } #{ last_name }"
   end
-
-  def github_path_generated
-    # Override from WithGithubFiles
-    "_authors/#{self.id}.md"
-  end
 end