Merge branch 'zj-update-lang-colors' into 'master'

Update programming language colors and metadata

See merge request gitlab-org/gitlab!43111

changelogs/unreleased/zj-update-lang-colors.yml

+---
+title: Update programming language colors and metadata
+merge_request: 43111
+author:
+type: changed

db/migrate/20200923102312_update_programming_language_colors.rb

+# frozen_string_literal: true
+require 'yaml'
+
+class UpdateProgrammingLanguageColors < ActiveRecord::Migration[6.0]
+  DOWNTIME = false
+
+  class ProgrammingLanguage < ActiveRecord::Base; end
+
+  def up
+    YAML.load_file("vendor/languages.yml").each do |name, metadata|
+      color = metadata["color"]
+      next unless color.present?
+
+      ProgrammingLanguage.where(name: name).update(color: color)
+    end
+  end
+
+  def down
+    # noop
+  end
+end

db/schema_migrations/20200923102312

+f19e61e3863905885c8b5b2129be2586d912d616a5b3b54e99a72c5760082059
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