Get the patch which fixes the --livereload flag

Otherwise, Jekyll fails with the following error:

/usr/local/lib/ruby/gems/2.6/gems/rb-kqueue-0.2.5/lib/rb-kqueue/event.rb:80:in callback!': undefined method callback!' for nil:NilClass (NoMethodError)

PR: 250432
Approved by: maintainer timeout
MFH: 2020Q4 (runtime fix)