Bump bootstrap in /samples/aspnet/WebApi/BSONSample/BSONSample (aspnet#91)

Bumps bootstrap from 3.0.3 to 3.4.1.

---
updated-dependencies:
- dependency-name: bootstrap
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

samples/aspnet/WebApi/BSONSample/BSONSample/packages.config

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="Antlr" version="3.5.0.2" targetFramework="net45" />
-  <package id="bootstrap" version="3.0.3" targetFramework="net45" />
+  <package id="bootstrap" version="3.4.1" targetFramework="net45" />
   <package id="EntityFramework" version="6.0.2" targetFramework="net45" />
   <package id="jQuery" version="1.10.2" targetFramework="net45" />
   <package id="Microsoft.AspNet.Mvc" version="5.2.3" targetFramework="net45" />