Update release notes

Author: colinangusmackay

release-notes/wip-release-notes.md

@@ -23,6 +23,9 @@ Date: ???
   - Microsoft.Extensions.Logging.Abstractions 5.0.0
   - Microsoft.Extensions.Logging.Console 5.0.0
 - .NET Core 3.1
+  - Bump Microsoft.Extensions.Configuration.EnvironmentVariables from 3.1.13 to 3.1.14
+  - Bump Microsoft.Extensions.Configuration.Json from 3.1.13 to 3.1.14
+  - Bump Microsoft.Extensions.Configuration.UserSecrets from 3.1.13 to 3.1.14
   - Bump Microsoft.Extensions.DependencyInjection from 3.1.13 to 3.1.14
   - Bump Microsoft.Extensions.Logging.Abstractions from 3.1.13 to 3.1.14
 - General