Update scalafmt-core to 3.8.6

Author: scala-steward-bot

.scalafmt.conf

@@ -7,7 +7,7 @@ continuationIndent.defnSite = 2
 docstrings.style = keep
 includeCurlyBraceInSelectChains = false
 optIn.breakChainOnFirstMethodDot = false
-version = "3.8.5"
+version = "3.8.6"
 rewrite.scala3.convertToNewSyntax = true
 runner.dialectOverride.allowSignificantIndentation = false
 runner.dialectOverride.allowAsForImportRename = false