[`BLIP`] update blip path on slow tests (#21476)

* update blip path

* Update tests/models/blip/test_modeling_blip.py

tests/models/blip/test_modeling_blip.py

@@ -1077,7 +1077,7 @@ class BlipTextImageModelTest(ModelTesterMixin, unittest.TestCase):
 
 # We will verify our results on an image of cute cats
 def prepare_img():
-    url = "https://storage.googleapis.com/sfr-vision-language-research/BLIP/demo.jpg"
+    url = "https://huggingface.co/hf-internal-testing/blip-test-image/resolve/main/demo.jpg"
     im = Image.open(requests.get(url, stream=True).raw)
     return im