[deploy] Fix case sensitive published bug (#10352)

app/labor/markdown_fixer.rb

@@ -4,7 +4,7 @@ class MarkdownFixer
   class << self
     def fix_all(markdown)
       methods = %i[
-        add_quotes_to_title add_quotes_to_description
+        add_quotes_to_title add_quotes_to_description lowercase_published
         modify_hr_tags convert_new_lines split_tags underscores_in_usernames
       ]
       methods.reduce(markdown) { |acc, elem| public_send(elem, acc) }
@@ -36,6 +36,12 @@ class MarkdownFixer
       end
     end
 
+    def lowercase_published(markdown)
+      markdown.gsub(/-{3}.*?-{3}/m) do |front_matter|
+        front_matter.gsub(/^published: /i, "published: ")
+      end
+    end
+
     def convert_new_lines(markdown)
       markdown.gsub("\r\n", "\n")
     end

spec/labor/markdown_fixer_spec.rb

@@ -7,6 +7,7 @@ RSpec.describe MarkdownFixer, type: :labor do
     <<~HEREDOC
       ---
       title: #{title}
+      published: false
       description: #{description}
       ---
     HEREDOC
@@ -98,6 +99,16 @@ RSpec.describe MarkdownFixer, type: :labor do
     end
   end
 
+  describe "::lowercase_published" do
+    it "lowercases the published frontmatter attribute" do
+      cases = %w[Published pubLished PUBLISHED]
+      cases.each do |_word|
+        result = described_class.lowercase_published(front_matter)
+        expect(result.match(/^published: false/).size).to eq 1
+      end
+    end
+  end
+
   describe "::fix_all" do
     it "escapes title and description" do
       result = described_class