DOCSP-35842: Add Scala Maven repository link to to installation page (#38)

* DOCSP-35842: Add link to Scala Maven repository to installation page

Co-authored-by: Mike Woofter <[email protected]>

Author: mcmorisi

source/installation.txt

@@ -12,7 +12,9 @@ Installation
    :keywords: dependency, reactive streams, add package, sbt, maven
 
 The recommended way to get started with the {+driver-short+} in your
-project is by using a dependency management system.
+project is by using a dependency management system. To manually
+download the MongoDB Scala driver, see the `Scala driver Maven repository
+<https://mvnrepository.com/artifact/org.mongodb.scala/mongo-scala-driver>`__.
 
 The following sections contain the Reactive Streams-based Scala
 implementation for asynchronous stream processing with non-blocking back