Changelog: condense Unreleased Scala/sbt entry to one line

Match the format of older entries and link the PR instead of the ticket.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: zlav

Changelog.md

@@ -2,7 +2,7 @@
 
 ## Unreleased
 
-- Scala/sbt: Run the uppercase `dependencyBrowseTreeHTML` task when the project explicitly enables `addDependencyTreePlugin` on sbt 1.4+. Previously the lowercase `dependencyBrowseTreeHtml` was used unconditionally for the explicit-plugin path, which sbt 1.4+ rejects, causing deep dependencies to be silently dropped. ([TKT-15490](https://fossa.atlassian.net/browse/ANE-2718))
+- Scala/sbt: Fix silently dropped deep dependencies on sbt 1.4+ with explicit `addDependencyTreePlugin`. ([#1711](https://github.com/fossas/fossa-cli/pull/1711))
 
 ## 3.17.6