upgrade pip version

Author: mollyheamazon

tox.ini

@@ -67,7 +67,7 @@ markers =
 [testenv]
 setenv =
     PYTHONHASHSEED=42
-pip_version = pip==21.3
+pip_version = pip==24.3
 passenv =
     AWS_ACCESS_KEY_ID
     AWS_SECRET_ACCESS_KEY
@@ -132,7 +132,7 @@ commands =
     twine check dist/*.tar.gz
 
 [testenv:sphinx]
-pip_version = pip==21.3
+pip_version = pip==24.3
 changedir = doc
 # pip install requirements.txt is separate as RTD does it in separate steps
 # having the requirements.txt installed in deps above results in Double Requirement exception