Merge pull request #822 from ruby/olleolleolle-patch-1

CI: use jruby-9.2.19.0

Author: hsbt

.github/workflows/ubuntu.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby: [ 'jruby-9.2.17.0', 'head', '3.0', '2.7', '2.6', '2.5' ]
+        ruby: [ 'jruby-9.2.19.0', 'head', '3.0', '2.7', '2.6', '2.5' ]
     steps:
     - uses: actions/checkout@v2
     - name: Set up Ruby