Update sbt, scripted-plugin to 1.10.9 (scalapb#1828)

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Author: scala-steward

project/build.properties

@@ -1 +1 @@
-sbt.version=1.10.7
+sbt.version=1.10.9