DOCSP-15007: update csharp driver to 2.12 (#725)

* DOCSP-15007: update csharp driver to 2.12

* update missed links

Author: terakilobyte

source/csharp.txt

@@ -20,11 +20,11 @@ Introduction
 The official MongoDB C#/.NET Driver provides asynchronous interaction
 with MongoDB.
 
-- `Getting Started <https://mongodb.github.io/mongo-csharp-driver/2.11/getting_started/>`__
+- `Getting Started <https://mongodb.github.io/mongo-csharp-driver/2.12/getting_started/>`__
 
-- `API Reference <https://mongodb.github.io/mongo-csharp-driver/2.11/apidocs/html/R_Project_CSharpDriverDocs.htm>`__
+- `API Reference <https://mongodb.github.io/mongo-csharp-driver/2.12/apidocs/html/R_Project_CSharpDriverDocs.htm>`__
 
-- `Changelog <https://mongodb.github.io/mongo-csharp-driver/2.11/what_is_new/>`__
+- `Changelog <https://mongodb.github.io/mongo-csharp-driver/2.12/what_is_new/>`__
 
 - `Source Code <https://github.com/mongodb/mongo-csharp-driver>`__
 
@@ -44,10 +44,10 @@ Installation
 ------------
 
 ``NuGet`` is the simplest way to get the driver. Use
-`MongoDB.Driver <http://www.nuget.org/packages/mongodb.driver>`__ for
+`MongoDB.Driver <https://www.nuget.org/packages/mongodb.driver>`__ for
 all new projects.
 
-For more information, see `Installation <https://mongodb.github.io/mongo-csharp-driver/2.11/getting_started/installation/>`__.
+For more information, see `Installation <https://mongodb.github.io/mongo-csharp-driver/2.12/getting_started/installation/>`__.
 
 
 Connect to MongoDB Atlas
@@ -66,7 +66,7 @@ Connect to MongoDB Atlas
    var database = client.GetDatabase("test");
 
 
-See `Connecting <https://mongodb.github.io/mongo-csharp-driver/2.11/reference/driver/connecting/>`__
+See `Connecting <https://mongodb.github.io/mongo-csharp-driver/2.12/reference/driver/connecting/>`__
 for more information.
 
 

source/includes/language-compatibility-table-csharp.rst

@@ -18,6 +18,20 @@
      - .NET 4.6
      - .NET 4.5
 
+   * - Version 2.12
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    * - Version 2.11
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@@ -161,7 +175,7 @@
      - |checkmark|
 
    * - Version 2.0
-     - 
+     -
      -
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source/includes/mongodb-compatibility-table-csharp.rst

@@ -15,6 +15,17 @@
      - MongoDB 3.0
      - MongoDB 2.6
 
+   * - Version 2.12
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    * - Version 2.11
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