Fix ZipDepth Vulkan grouped convolutions

README.md

@@ -30,7 +30,7 @@ config.json
 base/coreml/config.json
 base/coreml/zipdepth_base_384_coreml_fp32.pte       24.9 MB
 base/vulkan/config.json
-base/vulkan/zipdepth_base_384_vulkan_fp16.pte       12.3 MB
+base/vulkan/zipdepth_base_384_vulkan_fp16.pte       12.8 MB
 base/xnnpack/config.json
 base/xnnpack/zipdepth_base_384_xnnpack_fp32.pte     24.6 MB
 ```

base/vulkan/zipdepth_base_384_vulkan_fp16.pte

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:f3966cc629e1ba8f13d6fd7eb9a5abfe05df99c3f802cddd70fb428548b0e424
-size 12341250
+oid sha256:7115359b29c769f0f07d642874bb591e1415d19f4de55b7bd1b74803a7e119ab
+size 12796162