fix: repair malformed nextflow_schema.json

Missing closing brace for publish_dir_mode property caused
JSON parse error during nf-schema validation.

Author: edmundmiller

nextflow_schema.json

@@ -104,7 +104,8 @@
                     "description": "Method used to save pipeline results to output directory.",
                     "help_text": "The Nextflow `publishDir` option specifies which intermediate files should be saved to the output directory. This option tells the pipeline what method should be used to move these files. See [Nextflow docs](https://www.nextflow.io/docs/latest/process.html#publishdir) for details.",
                     "fa_icon": "fas fa-copy",
-                    "enum": ["symlink", "rellink", "link", "copy", "copyNoFollow", "move"],
+                    "enum": ["symlink", "rellink", "link", "copy", "copyNoFollow", "move"]
+                },
                 "max_multiqc_email_size": {
                     "type": "string",
                     "description": "File size limit when attaching MultiQC reports to summary emails.",