don't report identical config files as ambiguous

Author: cyanite

src/GitVersionCore/Configuration/NamedConfigFileLocator.cs

@@ -25,7 +25,7 @@ public override string GetConfigFilePath(string workingDirectory) =>
 
         public override void Verify(string workingDirectory, string projectRootDirectory)
         {
-            if (!Path.IsPathRooted(FilePath))
+            if (!Path.IsPathRooted(FilePath) && !FileSystem.PathsEqual(workingDirectory, projectRootDirectory))
             {
                 WarnAboutAmbiguousConfigFileSelection(workingDirectory, projectRootDirectory);
             }