Update to Gradle 9.3.1 and switch to Java 17/21/25 in build matrix

See glencoesoftware/bioformats2raw#294

Author: melissalinkert

.github/workflows/build.yml

@@ -11,7 +11,7 @@ jobs:
   build:
     strategy:
       matrix:
-        java: [8, 11, 17, 21]
+        java: [17, 21, 25]
         os: [ubuntu-latest]
     runs-on: ${{ matrix.os }}
     env:
@@ -38,7 +38,7 @@ jobs:
           path: build/distributions/*.zip
           retention-days: 30
       - name: Publish artifacts
-        if: github.event_name != 'pull_request' && matrix.java == 11 && github.repository_owner == 'glencoesoftware'
+        if: github.event_name != 'pull_request' && matrix.java == 17 && github.repository_owner == 'glencoesoftware'
         run: |
           ./gradlew -PArtifactoryUserName=${ArtifactoryUserName} -PArtifactoryPassword=${ArtifactoryPassword} publish
   release:
@@ -50,7 +50,7 @@ jobs:
       - name: Download artifacts from build
         uses: actions/download-artifact@v4
         with:
-          name: raw2ometiff 8
+          name: raw2ometiff 17
       - name: List artifacts
         run: ls -R
       - name: Create a GitHub release

gradle/wrapper/gradle-wrapper.jar

@@ -1,6 +1,7 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.7-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.3.1-bin.zip
 networkTimeout=10000
+validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists