[ci] test against latest jruby 9.4 + some variation

Author: kares

.github/workflows/ci-test.yml

@@ -13,7 +13,7 @@ jobs:
 
     strategy:
       matrix:
-        ruby-version: [ jruby-9.4.8.0 ]
+        ruby-version: [ jruby-9.4.12.0 ]
         java-version: [ 8, 11, 21, 23 ]
         distribution: [ temurin ]
         include:
@@ -38,6 +38,9 @@ jobs:
           - java-version: 17
             distribution: oracle
             ruby-version: jruby-9.4.7.0
+          - java-version: 21
+            distribution: oracle
+            ruby-version: jruby-9.4.8.0
       fail-fast: false
 
     steps:

.github/workflows/ci-test_provider.yml

@@ -13,7 +13,7 @@ jobs:
 
     strategy:
       matrix:
-        ruby-version: [ jruby-9.4.8.0 ]
+        ruby-version: [ jruby-9.4.12.0 ]
         java-version: [ 21, 23 ]
         distribution: [ temurin, oracle ]
         include: