Fix swapchain out of bounds (maplibre#3486)

Author: adrian-cojocaru

src/mbgl/vulkan/renderable_resource.cpp

@@ -160,8 +160,8 @@ void SurfaceRenderableResource::initSwapchain(uint32_t w, uint32_t h) {
     colorFormat = swapchainCreateInfo.imageFormat;
     extent = swapchainCreateInfo.imageExtent;
 
-    swapchainSemaphores.reserve(swapchainImageCount);
-    for (uint32_t index = 0; index < swapchainImageCount; ++index) {
+    swapchainSemaphores.reserve(swapchainImages.size());
+    for (uint32_t index = 0; index < swapchainImages.size(); ++index) {
         swapchainSemaphores.emplace_back(device->createSemaphoreUnique({}));
         backend.setDebugName(swapchainSemaphores.back().get(), "SurfaceSemaphore_" + std::to_string(index));
     }