Fix SI-9202: fix punctuation in MSI installer

Author: adriaanm

project/ScalaDist.scala

@@ -47,7 +47,7 @@ object ScalaDist {
     Seq(
       name                := "scala",
       maintainer          := "LAMP/EPFL and Typesafe, Inc. <scala-internals@googlegroups.com>",
-      packageSummary      := "The Scala Programming Language.",
+      packageSummary      := "The Scala Programming Language",
       packageDescription  := "Have the best of both worlds. Construct elegant class hierarchies for maximum code reuse and extensibility, implement their behavior using higher-order functions. Or anything in-between.",
       crossPaths          := false,