Update scalafmt-core to 2.6.0 (#128)

Author: BenFradet

.scalafmt.conf

@@ -1,4 +1,4 @@
-version = 2.5.3
+version = 2.6.0
 style = defaultWithAlign
 maxColumn = 100
 

server/src/main/scala/org/scalaexercises/evaluator/codecs.scala

@@ -21,7 +21,8 @@ import io.circe.{Decoder, Encoder}
 import org.http4s._
 import org.http4s.circe._
 
-/** Provides Json serialization codecs for the http4s services */
+/**
+ * Provides Json serialization codecs for the http4s services */
 trait Http4sCodecInstances {
 
   implicit def entityDecoderOf[F[_]: Sync, A: Decoder]: EntityDecoder[F, A] = jsonOf[F, A]