pin pydantic <2.0 (#18022)

pin pydantic <2.0

(cherry picked from commit 913fa99)

Author: Borda

requirements/app/base.txt

@@ -17,7 +17,7 @@ backoff >=2.2.1, <2.3.0
 
 fastapi >=0.92.0, <0.100.0
 starlette  # https://fastapi.tiangolo.com/deployment/versions/#about-starlette
-pydantic >=1.7.4, <2.0.0  # https://fastapi.tiangolo.com/deployment/versions/#about-pydantic
+pydantic >=1.7.4, <2.0.0  # strict # https://fastapi.tiangolo.com/deployment/versions/#about-pydantic
 
 dateutils <=0.6.12
 Jinja2 <=3.1.2