xz: Use https for homepage and mirror (Homebrew#13327)

Author: chdiza

Formula/xz.rb

@@ -2,9 +2,9 @@
 # https://github.com/Homebrew/homebrew/pull/21419
 class Xz < Formula
   desc "General-purpose data compression with high compression ratio"
-  homepage "http://tukaani.org/xz/"
+  homepage "https://tukaani.org/xz/"
   url "https://fossies.org/linux/misc/xz-5.2.3.tar.gz"
-  mirror "http://tukaani.org/xz/xz-5.2.3.tar.gz"
+  mirror "https://tukaani.org/xz/xz-5.2.3.tar.gz"
   sha256 "71928b357d0a09a12a4b4c5fafca8c31c19b0e7d3b8ebb19622e96f26dbf28cb"
 
   bottle do