Update sbt to 1.6.1 (mockito#432)

scala-steward · web-flow · commit 1cb813a41c5b · 2022-01-19T23:48:27.000+01:00
[skip ci]
diff --git a/project/build.properties b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.5.8
+sbt.version=1.6.1
