Add missing pages to navigation for hello nextflow

Author: ewels

mkdocs.yml

@@ -18,6 +18,8 @@ nav:
       - hello_nextflow/04_hello_modules.md
       - hello_nextflow/05_hello_containers.md
       - hello_nextflow/06_hello_config.md
+      - hello_nextflow/survey.md
+      - hello_nextflow/next_steps.md
   - Side Quests:
       - side_quests/nf-test.md
       - side_quests/workflows_of_workflows.md