push.yml: test with JDK 26

Author: stephengold

.github/workflows/push.yml

@@ -30,9 +30,9 @@ jobs:
       - uses: actions/checkout@v6
       - run: ./gradlew build --console=plain --stacktrace
 
-  Java21-MacOS:
+  Java21-Windows:
     if: contains(toJson(github.event.commits), '[ci skip] ') == false
-    runs-on: macos-26
+    runs-on: windows-2025
     timeout-minutes: 5
     steps:
       - uses: actions/setup-java@v5
@@ -41,28 +41,27 @@ jobs:
           java-version: 21
       - uses: actions/checkout@v6
       - run: ./gradlew build --console=plain --stacktrace
+        shell: bash
 
-  Java21-Windows:
+  Java25-Linux:
     if: contains(toJson(github.event.commits), '[ci skip] ') == false
-    runs-on: windows-2025
+    runs-on: ubuntu-24.04
     timeout-minutes: 5
     steps:
       - uses: actions/setup-java@v5
         with:
-          distribution: 'zulu'
-          java-version: 21
+          distribution: 'liberica'
+          java-version: 25
       - uses: actions/checkout@v6
       - run: ./gradlew build --console=plain --stacktrace
-        shell: bash
 
-  Java25-Linux:
+  Java26-MacOS:
     if: contains(toJson(github.event.commits), '[ci skip] ') == false
-    runs-on: ubuntu-24.04
-    timeout-minutes: 5
+    runs-on: macos-26
     steps:
       - uses: actions/setup-java@v5
         with:
           distribution: 'liberica'
-          java-version: 25
+          java-version: 26
       - uses: actions/checkout@v6
       - run: ./gradlew build --console=plain --stacktrace