Replace with real safetensors files; current ones are pytorch saves and potentially unsafe

The "safetensors" files provided for UltraPixel (ultrapixel_t2i.safetensors, lora_cat.safetensors) were not actually safetensors files at all. They were pytorch saves - potentially dangerous binaries - that misleadingly were named with the ".safetensors" extension. I converted both of them to legitimate safetensors files.

Here is a link to my PR for the GitHub repo for a ComfyUI node - it implements the ability to load these safetensor versions, in place of the pytorch saves:
https://github.com/2kpr/ComfyUI-UltraPixel/pull/27

lora_cat.safetensors

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:e7fdfdecb11110118d20e9135210e2452ef5edc0a7b3417cc7803061199713a1
-size 6381449
+oid sha256:9819a47d70a3b5fceb8d2a6fc185bba76c002fb54308153025b1383067e7d0fd
+size 6319256

ultrapixel_t2i.safetensors

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:bef96cabf1621405cd6fdc4ee51b3613e68dd593a4bda3306a021e085e73ee60
-size 211117679
+oid sha256:3b875e87378f87f5af89902b82eac37ba5efd037a995207e6001e426b9704494
+size 211067312