Make tarball extension regex explicit

Library/Homebrew/livecheck/strategy.rb

@@ -76,7 +76,12 @@ module Homebrew
       HTTP_HEAD_BODY_SEPARATOR = "\r\n\r\n"
 
       # A regex used to identify a tarball extension at the end of a string.
-      TARBALL_EXTENSION_REGEX = /\.t(?:ar\..+|[a-z0-9]+)$/i.freeze
+      TARBALL_EXTENSION_REGEX = /
+        \.t
+        (?:ar(?:\.(?:bz2|gz|lz|lzma|lzo|xz|Z|zst))?|
+        b2|bz2?|z2|az|gz|lz|lzma|xz|Z|aZ|zst)
+        $
+      /ix.freeze
 
       # An error message to use when a `strategy` block returns a value of
       # an inappropriate type.