Use java 17 in github tests

Author: samirelanduk

.github/workflows/main.yml

@@ -27,7 +27,7 @@ jobs:
       - name: Set up Java
         uses: actions/setup-java@v1
         with:
-          java-version: '11'
+          java-version: '17'
       - name: Install Nextflow ${{ matrix.nextflow-version }}
         run: |
           mkdir install