Update rules/Proj0808.md

Co-authored-by: Wesley Baartman <[email protected]>

Author: Corniel

rules/Proj0808.md

@@ -7,7 +7,7 @@ ancestor: Rules
 When using [Central Package Management](Proj0800.md) the central `Directory.Packages.props`
 it is possible to define a package reference globally with the use of
 [`<GlobalPackageReference>`](https://learn.microsoft.com/en-us/nuget/consume-packages/central-package-management#global-package-references).
-This references should be in your `Directory.Packages.props` only.
+These references should only be in your `Directory.Packages.props`.
 
 ## Compliant
 If defined in `Directory.Packages.props`