Bump bootstrap from 3.3.7 to 3.4.1 in /Source/CSharpDemos/PDIWebDemoCS

Bumps bootstrap from 3.3.7 to 3.4.1.

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

Author: dependabot[bot]

Source/CSharpDemos/PDIWebDemoCS/packages.config

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="bootstrap" version="3.3.7" targetFramework="net40" />
+  <package id="bootstrap" version="3.4.1" targetFramework="net40" />
   <package id="jQuery" version="3.3.1" targetFramework="net40" />
 </packages>