[CI] Updates: drop Ruby 3.1 (eol) adds Ruby and JRuby head

Author: picandocodigo

.buildkite/pipeline.yml

@@ -8,7 +8,6 @@ steps:
           - "3.4"
           - "3.3"
           - "3.2"
-          - "3.1"
         ruby_source:
           - "ruby"
         transport:
@@ -17,16 +16,12 @@ steps:
         - with: # JRuby tests
             ruby: "9.4"
             ruby_source: "jruby"
-            transport: "8.3"
+            transport: "8.4"
         # Test for different versions of transport
         - with:
             ruby: "3.4"
             ruby_source: "ruby"
             transport: "main"
-        - with:
-            ruby: "3.4"
-            ruby_source: "ruby"
-            transport: "8.2"
     env:
       RUBY_VERSION: "{{ matrix.ruby }}"
       STACK_VERSION: 9.1.0-SNAPSHOT

.github/workflows/main.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ['3.1', '3.2', '3.3', '3.4', 'jruby-9.3', 'jruby-9.4']
+        ruby: ['head', '3.2', '3.3', '3.4', 'jruby-9.3', 'jruby-9.4', 'jruby-head']
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4