transmission@nightly: update version, livecheck

File names for nightly `transmission` releases only include a hash
but we also need the build number to be able to use a fully-versioned
URL. Using a `lastSuccessfulBuild` dmg URL would result in a 404 (Not
Found) response when the next build occurs, as the expected file
won't be available anymore. With that in mind, we need to use a
build-specific dmg URL.

This updates the cask to include the build number in the `version`
and to capture that information in the `livecheck` block regex.
Unfortunately the dmg URL on the `lastSuccessfulBuild` page doesn't
use a build number but we can identify the build number from other
areas of the page.

Casks/t/transmission@nightly.rb

@@ -1,15 +1,18 @@
 cask "transmission@nightly" do
-  version "ed2c6c4085"
+  version "9662,ed2c6c4085"
   sha256 "7b705f4fcad1a200f6327c363c8ce8cdb923dd7ac08dbb22a87260f9199282a0"
 
-  url "https://build.transmissionbt.com/job/trunk-mac/lastSuccessfulBuild/artifact/release/Transmission-#{version}.dmg"
+  url "https://build.transmissionbt.com/job/trunk-mac/#{version.csv.first}/artifact/release/Transmission-#{version.csv.second}.dmg"
   name "Transmission"
   desc "Open-source BitTorrent client"
   homepage "https://transmissionbt.com/"
 
   livecheck do
     url "https://build.transmissionbt.com/job/trunk-mac/lastSuccessfulBuild/artifact/release/"
-    regex(/href=.*?Transmission[._-]([a-f0-9]+)\.dmg/i)
+    regex(/>\s*\#(\d+)\s*<.+?href=.*?Transmission[._-](\h+)\.dmg/im)
+    strategy :page_match do |page, regex|
+      page.scan(regex).map { |match| "#{match[0]},#{match[1]}" }
+    end
   end
 
   deprecate! date: "2025-05-01", because: :unsigned