Update sbt to 1.9.9

scala-steward · scala-steward · commit 8b8c5ca6849a · 2024-02-24T00:04:27.000Z
diff --git a/project/build.properties b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.9.8
+sbt.version=1.9.9
