Releases should also be ignored

"Releases" directory is created by Shimmer/Squirrel installer for example. It also should be ignored.

VisualStudio.gitignore

@@ -9,7 +9,7 @@
 # Build results
 [Dd]ebug/
 [Dd]ebugPublic/
-[Rr]elease/
+[Rr]elease[s]/
 x64/
 build/
 bld/