DRIVERS-1653 Add tests for redactions in command monitoring (#1007)

Author: benjirewis

source/command-monitoring/tests/README.rst

@@ -12,6 +12,9 @@ Command Monitoring
 Testing
 =======
 
+Tests in ``unified`` are implemented in the `Unified Test Format <../../unified-test-format/unified-test-format.rst>`__ and require
+schema version 1.0. Other tests should be run as described below.
+
 Tests are provided in YML and JSON format to assert proper upconversion of commands.
 
 Database and Collection Names