Support using Python 3.12 with Khoj

- RapidOCR for indexing image PDFs doesn't currently support python 3.12.
  It's an optional dependency anyway, so only install it if python < 3.12

pyproject.toml

@@ -47,12 +47,12 @@ dependencies = [
     "tenacity >= 8.2.2",
     "pillow ~= 9.5.0",
     "pydantic >= 2.0.0",
-    "pyyaml == 6.0",
+    "pyyaml ~= 6.0",
     "rich >= 13.3.1",
     "schedule == 1.1.0",
     "sentence-transformers == 2.5.1",
     "transformers >= 4.28.0",
-    "torch == 2.0.1",
+    "torch == 2.2.2",
     "uvicorn == 0.17.6",
     "aiohttp ~= 3.9.0",
     "langchain <= 0.2.0",
@@ -70,7 +70,7 @@ dependencies = [
     "gunicorn == 21.2.0",
     "lxml == 4.9.3",
     "tzdata == 2023.3",
-    "rapidocr-onnxruntime == 1.3.11",
+    "rapidocr-onnxruntime == 1.3.11; python_version<'3.12'",
     "openai-whisper >= 20231117",
     "django-phonenumber-field == 7.3.0",
     "phonenumbers == 8.13.27",