Improve ThisAssembly.Vsix wording a bit

src/ThisAssembly.Vsix/readme.md

@@ -5,7 +5,12 @@ MSBuild project properties from the VSIX manifest. For example:
 
 ![](https://raw.githubusercontent.com/devlooped/ThisAssembly/main/img/ThisAssembly.Vsix.png)
 
-And in the `source.extension.vsixmanifest`:
+In addition to making the [VSIX manifest metadata](https://learn.microsoft.com/en-us/visualstudio/extensibility/vsix-extension-schema-2-0-reference?view=vs-2022#metadata-element) 
+properties available as constants, the package also provides targets for those properties 
+with sensible defaults from project properties so that the manifest can leverage 
+[placeolder syntax](https://learn.microsoft.com/en-us/visualstudio/extensibility/vsix-extension-schema-2-0-reference?view=vs-2022#metadata-element) 
+and avoid duplication in the `source.extension.vsixmanifest`:
+
 ```xml
 <PackageManifest Version="2.0.0" ...>
   <Metadata>
@@ -18,12 +23,6 @@ And in the `source.extension.vsixmanifest`:
 </PackageManifest>
 ```
 
-As shown above, in addition to making the [VSIX manifest metadata](https://learn.microsoft.com/en-us/visualstudio/extensibility/vsix-extension-schema-2-0-reference?view=vs-2022#metadata-element) 
-properties available as constants, the package also provides targets for those properties 
-with sensible defaults from project properties so that the manifest can leverage 
-[placeolder syntax](https://learn.microsoft.com/en-us/visualstudio/extensibility/vsix-extension-schema-2-0-reference?view=vs-2022#metadata-element) 
-and avoid duplication. 
-
 The available properties and their default values are:
 
 | Name              | Default Value                       |
@@ -35,7 +34,6 @@ The available properties and their default values are:
 | VsixProduct       | `$(Product)`                        |
 | VsixPublisher     | `$(Company)`                        |
 | VsixLanguage      | `$(NeutralLanguage)` or 'en-US'     |
-| VsixDescription   | `$(Description)`                    |
 
 As shown in the example above, the syntax for using these properties from the `source.extension.vsixmanifest` is 
 `|%CurrentProject%;[PROPERTY]|`. This is because the package defines a corresponding target to