Bump bootstrap from 3.0.0 to 3.4.1 in /Web.FlashMessage.MvcExample

Bumps bootstrap from 3.0.0 to 3.4.1.

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Web.FlashMessage.MvcExample/packages.config

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="Antlr" version="3.4.1.9004" targetFramework="net46" />
-  <package id="bootstrap" version="3.0.0" targetFramework="net46" />
+  <package id="bootstrap" version="3.4.1" targetFramework="net46" />
   <package id="EntityFramework" version="6.1.3" targetFramework="net46" />
   <package id="jQuery" version="1.10.2" targetFramework="net46" />
   <package id="jQuery.Validation" version="1.11.1" targetFramework="net46" />