Update docs

_sources/index.md.txt

@@ -6,6 +6,7 @@ Status](https://github.com/domainaware/parsedmarc/actions/workflows/python-tests
 Coverage](https://codecov.io/gh/domainaware/parsedmarc/branch/master/graph/badge.svg)](https://codecov.io/gh/domainaware/parsedmarc)
 [![PyPI
 Package](https://img.shields.io/pypi/v/parsedmarc.svg)](https://pypi.org/project/parsedmarc/)
+[![PyPI - Downloads](https://img.shields.io/pypi/dm/parsedmarc?color=blue)](https://pypistats.org/packages/parsedmarc)
 
 :::{note}
 **Help Wanted**

_sources/usage.md.txt

@@ -105,7 +105,7 @@ The full set of configuration options are:
       Elasticsearch, Splunk and/or S3
   - `strip_attachment_payloads` - bool: Remove attachment
       payloads from results
-  - `output` - str: Directory to place JSON and CSV files in
+  - `output` - str: Directory to place JSON and CSV files in.  This is required if you set either of the JSON output file options.
   - `aggregate_json_filename` - str: filename for the aggregate
       JSON output file
   - `forensic_json_filename` - str: filename for the forensic