Bump bootstrap from 3.3.7 to 3.4.1 in /Demos/Aspose.Cells.API

Bumps bootstrap from 3.3.7 to 3.4.1.

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

Author: dependabot[bot]

Demos/Aspose.Cells.API/Aspose.Cells.API.csproj

@@ -281,7 +281,7 @@
   <ItemGroup>
     <PackageReference Include="Antlr" Version="3.5.0.2" />
     <PackageReference Include="Aspose.PDF" Version="20.10.0" />
-    <PackageReference Include="bootstrap" Version="3.3.7" />
+    <PackageReference Include="bootstrap" Version="3.4.1" />
     <PackageReference Include="jQuery" Version="3.3.1" />
     <PackageReference Include="log4net" Version="2.0.4" />
     <PackageReference Include="Microsoft.ApplicationInsights.Web" Version="2.6.4" />