Update README.md

README.md

@@ -1,6 +1,6 @@
 # @mongodb-js/zstd
 
-[![CI](https://github.com/mongodb-js/zstd/actions/workflows/CI.yml/badge.svg)](https://github.com/mongodb-js/zstd/actions/workflows/test.yml)
+[![CI](https://github.com/mongodb-js/zstd/actions/workflows/test.yml/badge.svg)](https://github.com/mongodb-js/zstd/actions/workflows/test.yml)
 
 Zstandard compression library for Node.js
 
@@ -63,6 +63,9 @@ Only the following version combinations with the [MongoDB Node.js Driver](https:
 | `[email protected]` | ✓                      |
 | `[email protected]` | N/A                    |
 
+`@mongodb-js/[email protected]` is compatible with `[email protected]` and above.  `@mongodb-js/[email protected]` will work with
+older versions of mongodb, but will produce peer dependency errors upon installation.
+
 ## API
 
 ```ts