Update webhook port to 8080 to match other exporters (#865)

Signed-off-by: Michal Pryc <mpryc@redhat.com>

Author: mpryc

exporters/webhook/app.py

@@ -229,4 +229,4 @@ async def metrics():
     collector = load_and_log(WebhookCommitCollector)
     REGISTRY.register(collector)
 
-    uvicorn.run(app, host="0.0.0.0", port=8000)
+    uvicorn.run(app, host="0.0.0.0", port=8080)