Enable py314 tests

Author: xrmx

tox.ini

@@ -187,8 +187,7 @@ envlist =
     ; below mean these dependencies are being used:
     ; 0: urllib3 >=1.0.0,<2.0.0
     ; 1: urllib3 >=2.0.0,<3.0.0
-    ; TODO #4200  Add py314 testing after replacing httpretty -- problem with https tests in 3.14
-    py3{9,10,11,12,13}-test-instrumentation-urllib3-{0,1}
+    py3{9,10,11,12,13,14}-test-instrumentation-urllib3-{0,1}
     pypy3-test-instrumentation-urllib3-{0,1}
     lint-instrumentation-urllib3