Replace setup-scala with setup-java in snapshot workflow (#677)

Updates snapshot.yml to use actions/setup-java@v4 instead of olafurpg/setup-scala@v14 for better consistency with other workflows and official GitHub Actions.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-authored-by: Claude <[email protected]>

Author: xerial

.github/workflows/snapshot.yml

@@ -24,9 +24,10 @@ jobs:
           fetch-depth: 10000
        # Fetch all tags so that sbt-dynver can find the previous release version
       - run: git fetch --tags
-      - uses: olafurpg/setup-scala@v14
+      - uses: actions/setup-java@v4
         with:
-          java-version: [email protected]
+          distribution: 'zulu'
+          java-version: '11'
       - uses: actions/cache@v4
         with:
           path: ~/.cache