[AI-5184] pin urllib3 (#19900)

* pin urllib3

* Add comment to pyproject.toml

* spacing:

Author: sarah-witt

LICENSE-3rdparty.csv

@@ -84,5 +84,6 @@ snowflake-connector-python,PyPI,Apache-2.0,"Copyright (c) 2013-2023 Snowflake Co
 supervisor,PyPI,BSD-3-Clause-Modification,"Copyright (c) 2002-2005, Daniel Krech, http://eikeon.com/"
 tuf,PyPI,Apache-2.0,Copyright (c) 2010 New York University
 tuf,PyPI,MIT,Copyright (c) 2010 New York University
+urllib3,PyPI,MIT,Copyright (c) 2008-2020 Andrey Petrov and contributors.
 vertica-python,PyPI,Apache-2.0,"Copyright 2013 Justin Berka, Alex Kim, Siting Ren"
 wrapt,PyPI,BSD-3-Clause,"Copyright (c) 2013-2023, Graham Dumpleton"

agent_requirements.in

@@ -67,5 +67,6 @@ simplejson==3.20.1
 snowflake-connector-python==3.13.2
 supervisor==4.2.5
 tuf==4.0.0
+urllib3==2.3.0
 vertica-python==1.4.0
 wrapt==1.17.2

datadog_checks_base/pyproject.toml

@@ -50,6 +50,9 @@ deps = [
     "requests-unixsocket2==0.4.2",
     "requests==2.32.3",
     "simplejson==3.20.1",
+    # urllib3 is a dependency of requests that we explicitly
+    # make use of in a few places
+    "urllib3==2.3.0",
     "wrapt==1.17.2",
 ]
 http = [