Merge pull request #604 from ruby/fix-broken-ci

JRuby 9.1 and 9.2 are EOL now

Author: hsbt

.github/workflows/ci.yml

@@ -29,8 +29,6 @@ jobs:
         ruby: ${{ fromJson(needs.ruby-versions.outputs.versions) }}
         include:
         - { os: windows-latest , ruby: mswin     } # ruby/ruby windows CI
-        - { os: ubuntu-latest  , ruby: jruby-9.1 } # Ruby 2.3
-        - { os: ubuntu-latest  , ruby: jruby-9.2 } # Ruby 2.5
         - { os: ubuntu-latest  , ruby: jruby-9.3 } # Ruby 2.7
         - { os: ubuntu-latest  , ruby: jruby-9.4 } # Ruby 3.1
         - { os: macos-latest   , ruby: truffleruby-head }