Update java8-publish.yml

Author: filip26

.github/workflows/java8-publish.yml

@@ -14,7 +14,7 @@ jobs:
       - name: Set up JDK 8
         uses: actions/setup-java@v4
         with:
-          java-version: 8
+          java-version: '8'
           distribution: 'temurin'
           server-id: ossrh
       - name: Import GPG Key