fix: exclude broken python requests versions which cause docker.py failures (docker/docker-py#3256 and #3257)

Author: jrmfg

tox.ini

@@ -9,6 +9,7 @@ deps =
     pytest-cov
     pytest-integration
     pretend
+    requests >= 2.32.2, < 2.32.0
 setenv =
     PYTESTARGS = --cov=functions_framework --cov-branch --cov-report term-missing --cov-fail-under=100
     windows-latest: PYTESTARGS =