Update source/whats-new.txt

Author: mongoKart

source/whats-new.txt

@@ -110,7 +110,7 @@ The {+driver-short+} v6.8 release includes the following features:
   rather than decoding the entire BSON response when it is received.
 
 - The Github release for the ``mongodb`` package now contains a detached signature file,
-   ``mongodb-X.Y.Z.tgz.sig``, for the NPM package. This change applies to every major
+  ``mongodb-X.Y.Z.tgz.sig``, for the NPM package. This change applies to every major
   and patch release for versions 5.x and 6.x of the driver. To verify the package signature,
   follow the instructions in the Release Integrity section of the
   `README.md <https://github.com/mongodb/node-mongodb-native/blob/v6.8.0/README.md#release-integrity>`__