chore(deps): update dependency pytest to v9

pactflow-renovate-bot[bot] · web-flow · commit 2e81b9c1a68e · 2025-11-16T13:16:25.000Z
Ref: PACT-445
diff --git a/requirements.txt b/requirements.txt
@@ -1,4 +1,4 @@
 Flask==3.1.2
-pytest==8.4.2
+pytest==9.0.1
 requests==2.32.5
 pact_python==2.3.3
