fix(install.sh): vulkan docker tag (#5589)

vulkan docker tag is not prefixed with gpu

```
regctl tag ls localai/localai | grep 2.29 | grep vulkan
v2.29.0-vulkan
```

Signed-off-by: Gavin Mogan <github@gavinmogan.com>

docs/static/install.sh

@@ -663,7 +663,7 @@ install_docker() {
 
     IMAGE_TAG=
     if [ "$USE_VULKAN" = true ]; then
-        IMAGE_TAG=${LOCALAI_VERSION}-gpu-vulkan
+        IMAGE_TAG=${LOCALAI_VERSION}-vulkan
 
         info "Starting LocalAI Docker container..."
         $SUDO docker run -v local-ai-data:/build/models \