Pinned version of dependency that broke the build (#2133)

* Pinned version of dependency that broke the build

Author: antonpirker

tox.ini

@@ -421,6 +421,7 @@ deps =
     starlite: python-multipart
     starlite: requests
     starlite: cryptography
+    {py3.8,py3.9}-starlite: typing-extensions==4.5.0  # this is used by pydantic, which is used by starlite. When the problem is fixed in here or pydantic, this can be removed
 
     # SQLAlchemy
     sqlalchemy-v1.2: sqlalchemy>=1.2,<1.3