Add jruby-10.0.5.0 to test_11g matrix with Oracle JDK 21

Add jruby-10.0.5.0 to the test_11g workflow matrix so the JDBC code
path is exercised against Oracle 11g XE.

Set up Oracle JDK 21 explicitly via actions/setup-java for JRuby
matrix entries (scoped via `if: startsWith(matrix.ruby, 'jruby')`),
and gate the Install JDBC Driver step on the same condition so MRI
matrix entries skip the unused Oracle download.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: yahonda

.github/workflows/test_11g.yml

@@ -12,14 +12,15 @@ jobs:
     if: github.event_name != 'pull_request' || !github.event.pull_request.draft
 
     runs-on: ubuntu-latest
-    continue-on-error: true
+    continue-on-error: false
     strategy:
       matrix:
         ruby: [
           '4.0',
           '3.4',
           '3.3',
-          '3.2'
+          '3.2',
+          'jruby-10.0.5.0',
         ]
     env:
       ORACLE_HOME: /opt/oracle/instantclient_21_15
@@ -46,6 +47,12 @@ jobs:
 
     steps:
     - uses: actions/checkout@v6
+    - name: Set up Java
+      if: startsWith(matrix.ruby, 'jruby')
+      uses: actions/setup-java@v4
+      with:
+        distribution: oracle
+        java-version: '21'
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
@@ -66,6 +73,7 @@ jobs:
         sudo unzip -qo instantclient-sdk-linux.x64-21.15.0.0.0dbru.zip -d /opt/oracle
         echo "/opt/oracle/instantclient_21_15" >> $GITHUB_PATH
     - name: Install JDBC Driver
+      if: startsWith(matrix.ruby, 'jruby')
       run: |
         wget -q https://download.oracle.com/otn-pub/otn_software/jdbc/23261/ojdbc17.jar -O ./lib/ojdbc17.jar
     - name: Configure ORA_TZFILE to match Oracle 11g server