Add Ubuntu 26.04 support

GitHub recently launched Ubuntu 26.04 support in public preview.

actions/runner-images#14226

Author: enescakir

.github/workflows/build.yml

@@ -10,7 +10,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ ubuntu-22.04, ubuntu-24.04, ubuntu-22.04-arm, ubuntu-24.04-arm, macos-15-intel, macos-14 ]
+        os: [ ubuntu-22.04, ubuntu-24.04, ubuntu-26.04, ubuntu-22.04-arm, ubuntu-24.04-arm, ubuntu-26.04-arm, macos-15-intel, macos-14 ]
         ruby: [jruby-10.0.6.0]
     runs-on: ${{ matrix.os }}
     steps:

copy_to_separate_releases.rb

@@ -16,6 +16,8 @@ def sh(*args, **kwargs)
   'ubuntu-22.04-arm64' => 'ubuntu-22.04-arm64',
   'ubuntu-24.04'       => 'ubuntu-24.04-x64',
   'ubuntu-24.04-arm64' => 'ubuntu-24.04-arm64',
+  'ubuntu-26.04'       => 'ubuntu-26.04-x64',
+  'ubuntu-26.04-arm64' => 'ubuntu-26.04-arm64',
   'windows-latest'     => 'windows-x64',
   'windows-arm64'      => 'windows-arm64',
 }