Update titiler-pgstac to 2.2.3 to avoid breaking change from starlette/Fastapi

[vincentsarago]

Starting with 0.93, FastAPI has updated the Starlette requirement which broke both titiler and titiler-pgstac (because Request.url_for now return a URL object, not a string), we fixed this upstream in titiler and titiler-pgstac.

planetary-computer-apis/pctiler/setup.py

Line 18 in 90cd846

"titiler.pgstac==0.2.2",

ref: stac-utils/titiler-pgstac#80

Note: the FastAPI/Starlette requirements is set in multiple place in the project (pctiler, pcstac, pccommon) so extra care should be taking when changing it