Respect third dimension in getCacheFilePathForVQ

src/main/java/azgracompress/cache/QuantizationCacheManager.java

@@ -51,8 +51,8 @@ public class QuantizationCacheManager {
                                        final int codebookSize,
                                        final V3i vDim) {
         final File inputFile = new File(trainFile);
-        return new File(cacheFolder, String.format("%s_%d_%dx%d.qvc", inputFile.getName(), codebookSize,
-                vDim.getX(), vDim.getY()));
+        return new File(cacheFolder, String.format("%s_%d_%dx%dx%d.qvc", inputFile.getName(), codebookSize,
+                                                   vDim.getX(), vDim.getY(), vDim.getZ()));
     }