fix httpx

Signed-off-by: emdneto <[email protected]>

Author: emdneto

tox.ini

@@ -315,7 +315,8 @@ envlist =
     ; below mean these dependencies are being used:
     ; 0: httpx>=0.18.0,<0.19.0 respx~=0.17.0
     ; 1: httpx>=0.19.0 respx~=0.20.1
-    py3{8,9,10,11,12,13}-test-instrumentation-httpx-{0,1}
+    py3{8,9,10,11,12}-test-instrumentation-httpx-{0,1}
+    py313-test-instrumentation-httpx-1
     pypy3-test-instrumentation-httpx-{0,1}
     lint-instrumentation-httpx