message: chore(readme): mention MONGOSH_SERVER_TEST_VERSION for testing
diff: @@ -127,14 +127,8 @@ Run tests with all output from packages:
  lerna run test --stream
  ```
  -Getting the Stitch integration tests running requires the 2 following env
  -variables to be set:
  -
  -- `STITCH_TEST_APP_ID`
  -- `STITCH_TEST_SERVICE_NAME`
  -
  -These can be gotten from the mongosh-test cluster in the Compass Atlas
  -clusters.
  +To test against a specific version, the `MONGOSH_SERVER_TEST_VERSION`
  +environment variable can be set to a semver string specifying a server version.
  ### Starting the CLI
  