Update dependencies in requirements.txt

This commit modifies the version specifications for two packages in the requirements.txt file:
- Updated cffi from a fixed version 1.15.1 to a more flexible version 1.*,
  allowing for any minor updates within the major version 1.
- Updated PyJWT from a fixed version 2.6.0 to 2.*,
  enabling compatibility with any minor updates within the major version 2.

requirements.txt

@@ -3,7 +3,7 @@ asgiref==3.5.2
 attrs==22.2.0
 bleach==5.0.1
 certifi==2022.12.7
-cffi==1.15.1
+cffi==1.*
 charset-normalizer==3.0.1
 coreapi==2.3.3
 coreschema==0.0.4
@@ -38,7 +38,7 @@ promise==2.3
 psycopg2-binary
 pycparser==2.21
 pydot==1.4.2
-PyJWT==2.6.0
+PyJWT==2.*
 pyparsing==3.0.9
 python3-openid==3.2.0
 pytz==2022.7.1