Re-adding matrix for JDK 8.

.github/workflows/ci.yml

@@ -44,6 +44,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-latest, windows-latest, macos-13 ]
+        java: [ 8 ]
     runs-on: ${{ matrix.os }}
     permissions:
       checks: write
@@ -52,7 +53,7 @@ jobs:
       - uses: actions/setup-java@99b8673ff64fbf99d8d325f52d9a5bdedb8483e9 # v4.2.1
         with:
           distribution: 'temurin'
-          java-version: 8
+          java-version: ${{ matrix.java }}
           java-package: jdk
           cache: 'maven'
       - name: Run Tests
@@ -62,7 +63,7 @@ jobs:
         if: ${{ !cancelled() }}
         with:
           report_paths: "**/target/surefire-reports/TEST*.xml"
-          check_name: Unit Test Results for OpenJDK 8 on ${{ matrix.os }}
+          check_name: Unit Test Results for OpenJDK ${{ matrix.java }} on ${{ matrix.os }}
 
   test_oracle:
     name: Test Oracle JDK 8 with KCMS=${{ matrix.kcms }}