devel/rubygem-ruby-lsp-rails: Allow build with rubygem-ruby-lsp 0.21.0+

• Bump PORTREVISION for package change

Obtained from: https://github.com/Shopify/ruby-lsp-rails/commit/77650f0303da7bd0ff7ce718721f3fef767e16de

		https://github.com/Shopify/ruby-lsp-rails/commit/3a01040ac964764cf672c4c59f3b7d92da8f015a