Update task.json creation instructions

The PR aims to fix the problem that there is no 'Create tasks.json file from template' option shown on configuring VS Code. More information on creating tasks.json added along with suggestions.

development/cpp/configuring_an_ide/visual_studio_code.rst

@@ -27,6 +27,8 @@ Importing the project
 
 .. figure:: img/vscode_create_tasksjson_others.png
    :align: center
+ 
+- If there is no such option as **Create tasks.json file from template** available, either delete the file if it already exists in your folder or create a ``.vscode/tasks.json`` file manually. See `Tasks in Visual Studio Code <https://code.visualstudio.com/docs/editor/tasks#_custom-tasks>`_ for more details on tasks.
 
 - Within the ``tasks.json`` file find the ``"tasks"`` array and add a new section to it: