chore(pyproject): bump version and update httpx dependency to match o…

…llama dependency

- increment version to 0.0.1a15
- update httpx dependency to >=0.27.0

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "yadt"
-version = "0.0.1a14"
+version = "0.0.1a15"
 description = "Yet Another Document Translator"
 license = "AGPL-3.0"
 readme = "README.md"
@@ -13,7 +13,7 @@ keywords = ["PDF"]
 dependencies = [
     "bitstring>=4.3.0",
     "configargparse>=1.7",
-    "httpx>=0.28.1",
+    "httpx>=0.27.0",
     "huggingface-hub>=0.27.0",
     "numpy>=2.0.2",
     "onnx>=1.17.0",