Update scalafmt-core to 3.9.10 (#686)

Co-authored-by: typelevel-steward[bot] <106827141+typelevel-steward[bot]@users.noreply.github.com>

Author: typelevel-steward[bot]

.scalafmt.conf

@@ -1,4 +1,4 @@
-version = "3.9.4"
+version = "3.9.10"
 
 runner.dialect = scala213