Expose MultiDB API for Public Preview

Author: tom-andersen

.changeset/hungry-zebras-laugh.md

@@ -2,4 +2,4 @@
 "@firebase/firestore": minor
 ---
 
-Expose MultiDB API for Public Preview. [#7356](https://github.com/firebase/firebase-js-sdk/pull/7356)
+Expose the MultiDB API for Public Preview. [#7356](https://github.com/firebase/firebase-js-sdk/pull/7356)