CI: Fix copy-paste error in 3.13 tests that would only have run 3.13

Author: chrysn

.gitlab-ci.yml

@@ -70,8 +70,8 @@ test:3.13:
     - rm -f .coverage* collected-coverage
     - pip install tox
     # Separate run so I don't waste time telling errors in setup apart from errors at runtime
-    - tox --notest --skip-env '^py31[^2]'
-    - "AIOCOAP_TEST_MCIF=\"$(ip -j -6 route list default | python3 -c 'import sys, json; print(json.load(sys.stdin)[0][\"dev\"])')\" tox --skip-env '^py31[^2]'"
+    - tox --notest --skip-env '^py31[^3]'
+    - "AIOCOAP_TEST_MCIF=\"$(ip -j -6 route list default | python3 -c 'import sys, json; print(json.load(sys.stdin)[0][\"dev\"])')\" tox --skip-env '^py31[^3]'"
     - mkdir collected-coverage/tox-3.13/ -p
     - mv .coverage* collected-coverage/tox-3.13/
   artifacts: