RUST-1671 fle2v2-CreateCollection tests expect embedded nulls to be treated specially (#1487)

Author: Julia-Garland

src/test/spec/json/transactions/legacy-test-format.md

@@ -244,7 +244,7 @@ Then for each element in `tests`:
 
 13. If the test includes a list of command-started events in `expectations`, compare them to the actual command-started
     events using the same logic as the
-    [legacy Command Monitoring Spec Tests runner](../../command-logging-and-monitoring/tests/README.md), plus the
+    `legacy Command Monitoring Spec Tests runner <https://github.com/mongodb/specifications/blob/09ee1ebc481f1502e3246971a9419e484d736207/source/command-monitoring/tests/README.rst#expectations>`_, plus the
     rules in the Command-Started Events instructions below.
 
 14. If `failPoint` is specified, disable the fail point to avoid spurious failures in subsequent tests. The fail point