FindHSPELL: capitalize Hspell properly

Modules/FindHSPELL.cmake

@@ -1,10 +1,10 @@
-# - Try to find HSPELL
+# - Try to find Hspell
 # Once done this will define
 #
-#  HSPELL_FOUND - system has HSPELL
-#  HSPELL_INCLUDE_DIR - the HSPELL include directory
-#  HSPELL_LIBRARIES - The libraries needed to use HSPELL
-#  HSPELL_DEFINITIONS - Compiler switches required for using HSPELL
+#  HSPELL_FOUND - system has Hspell
+#  HSPELL_INCLUDE_DIR - the Hspell include directory
+#  HSPELL_LIBRARIES - The libraries needed to use Hspell
+#  HSPELL_DEFINITIONS - Compiler switches required for using Hspell
 #
 #  HSPELL_VERSION_STRING - The version of Hspell found (x.y)
 #  HSPELL_MAJOR_VERSION  - the major version of Hspell