Update vector-quantize-pytorch requirement from 1.14.7 to 1.15.6

---
updated-dependencies:
- dependency-name: vector-quantize-pytorch
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

pyproject.toml

@@ -33,7 +33,7 @@ torchvision = "*"
 accelerate = "0.33.0"
 datasets = "*"
 loguru = "*"
-vector-quantize-pytorch = "1.14.7"
+vector-quantize-pytorch = "1.15.6"
 beartype = "0.17.2"
 tqdm = "4.66.4"
 rich = "13.7.1"