Update sbt, scripted-plugin to 1.11.6 in 0.11.x (#1960)

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

Author: scala-steward

project/build.properties

@@ -1 +1 @@
-sbt.version=1.11.5
+sbt.version=1.11.6