fix: requirements.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-REQUESTS-6928867

requirements.txt

@@ -41,7 +41,7 @@ python3-openid==3.2.0
 readtime==2.0.0
 redis==4.3.4; python_version >= '3.6'
 requests-oauthlib==1.3.1; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
-requests==2.28.1; python_version >= '3.7' and python_version < '4'
+requests==2.32.0; python_version >= '3.7' and python_version < '4'
 six==1.16.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
 social-auth-app-django==5.0.0
 social-auth-core==4.3.0; python_version >= '3.6'