fix: requirements.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-URLLIB3-10390193
- https://snyk.io/vuln/SNYK-PYTHON-URLLIB3-10390194

requirements.txt

@@ -1,5 +1,6 @@
 colored==1.4.4
 deluge-client==1.9.0
-requests==2.31.0
+requests==2.28.1
 sshtunnel==0.4.0
 typer==0.7.0
+urllib3>=2.5.0 # not directly required, pinned by Snyk to avoid a vulnerability